1442:
1511:
980:, and alluvial fans, with an elevation of 4,600 to 6,500 feet (1,403 to 1,981 m). Less rugged than the surrounding hills and mountains, it is dominated by sagebrush grassland and lacks the woodlands, open conifer forests, and saltbush–greasewood vegetation of neighboring regions. The valleys drain mostly to the Snake River and fish assemblages are unlike those of the internally drained basins to the south. Potential vegetation includes bluebunch wheatgrass, Wyoming big sagebrush, cheatgrass, and Sandberg bluegrass. The steppe valleys are less suitable for cropland agriculture and have less available water than many parts of the Snake River Plain, but non-irrigated wheat and barley farming is common. The region covers 1,865 square miles (4,830 km) in southeastern Idaho and 7 square miles (18 km) across the Utah border.
1454:
59:
417:
1387:
952:, externally drained by the Snake River, is composed of gently sloping valley bottoms and alluvial fans dominated by salt-tolerant vegetation that distinguishes it from the sagebrush steppe of surrounding regions. Elevation varies from 4,500 to 6,000 feet (1,372 to 1,829 m). Light-colored soils with high salt and alkali content are common; they are dry for extended periods and may be leached of salt by irrigation water. Potential natural vegetation is mostly saltbush-greasewood, featuring Nuttall sagebrush, squirreltail,
1295:
1472:
1252:
1309:
1266:
1323:
44:
1491:
1402:
1351:
1420:
1280:
1337:
843:
bottlebrush squirreltail, Sandberg's bluegrass, and cheatgrass. Rocky areas support scattered western juniper. It is mostly used for rangeland and wildlife habitat, with some hay and small grain farming. Cheatgrass has replaced depleted bunchgrasses in overgrazed areas. The region covers 2,991 square miles (7,747 km) in Oregon and 1,293 square miles (3,349 km) in Idaho, including
1798:
1746:
1688:
1628:
912:. Higher elevations once supported Lahontan cutthroat trout but water availability limits their present distribution. The largest of the Northern Basin and Range subregions, the High Lava Plains covers 10,262 square miles (26,578 km) in Oregon and 5,740 square miles (14,867 km) in Nevada, featuring a variety of land uses, including rangeland, wildlife habitat, irrigated
444:, with perennial and intermittent streams draining to the Snake River. Elevation varies from 4,000 to 7,300 feet (1,219 to 2,225 m). The region is less wooded, lower, and more arid than neighboring subregions in the Northern Basin and Range. It differs from sagebrush-dominated regions in the Central Basin and Range in having higher
1017:, and associated grasses, such as Idaho fescue, bluebunch wheatgrass, Sandberg bluegrass, Nevada bluegrass, Great Basin wildrye, bottlebrush squirreltail, mountain brome, and Thurber needlegrass. Aspen and chokecherry are found in protected snow pockets, with willow and chokecherry in riparian areas. Rockier soils support
512:
areas. One of the largest
Northern Basin and Range subregions, the Dissected High Lava Plateau covers 5,364 square miles (13,893 km) in Idaho, 3,984 square miles (10,319 km) in Oregon, 3,537 square miles (9,161 km) in Nevada, and 412 square miles (1,067 km) in Utah, including much
1140:
are found at the highest elevations. On Steens
Mountain, above the juniper woodland zone of the Semirarid Uplands, the landscape is almost treeless; broad areas of mountain big sagebrush alternate with scattered groves of aspen. Alpine areas on Steens Mountain were seriously eroded following intense
746:
birds and associated upland birds and mammals. Elevation varies from 4,000 to 5,200 feet (1,219 to 1,646 m). The fine-textured soils are poorly drained, and basins collect water seasonally. Although water levels fluctuate from year to year, lakes and wetlands in this
897:. Vegetation on the steppe includes Wyoming big sagebrush, low sagebrush, mountain big sagebrush, Lahontan sagebrush, bluebunch wheatgrass, Sandberg's bluegrass, Thurber's needlegrass, bottlebrush squirreltail, and Idaho fescue. Silver sagebrush, creeping wildrye, and mat muhly are found in
842:
is higher, and water availability is greater. These attributes, combined with its remote location, make the region a particularly valuable refuge for wildlife. The steppe is characterized by
Wyoming big sagebrush, basin big sagebrush, Douglas rabbitbrush, bluebunch wheatgrass, Idaho fescue,
1025:, grazing pressure, and fire suppression. Juniper woodland is currently absent in the Jarbidge and Santa Rosa mountains, where mountain brush and scattered aspen groves occupy the woodland zone. Cold water fisheries occur in the moderate to high gradient perennial streams; threatened
1194:, rabbitbrush, Thurber needlegrass, Indian ricegrass, Sandberg bluegrass, and bottlebrush squirreltail. The region covers 725 square miles (1,878 km) in Oregon and 355 square miles (919 km) in Nevada, including a small part of the Sheldon National Wildlife Refuge.
1226:
by wind when dry. Surface material is clayey, saline, alkaline, and poorly drained. Sand dunes and mud flats occur. This region is mostly barren; vegetation, where present, is sparse and composed of very salt-tolerant plants, such as alkali sacaton and
960:, and greasewood. Basin sagebrush, Wyoming big sagebrush, bluebunch wheatgrass, needlegrass, bluegrass, and Indian ricegrass are also present. The region covers 438 square miles (1,134 km) in Idaho and 52 square miles (130 km) in Utah, in the
1161:
is composed of arid basins formerly inundated by
Pleistocene lakes. Elevation varies from 3,500 to 5,200 feet (1,067 to 1,585 m) The nearly flat to gently sloping basins and playas are poorly drained, have a high
634:, mountain brush, and sagebrush grassland. North-facing slopes may support Douglas-fir, lodgepole pine, subalpine conifers, aspen, and snowberry. South-facing slopes may support mountain big sagebrush, serviceberry, snowberry, Idaho fescue,
2273:
1912:
1441:
597:
and livestock grazing, which is the primary land use today. The ecoregion covers 3,567 square miles (9,238 km) in Idaho, 1,011 square miles (2,618 km) in Nevada, and 479 square miles (1,241 km) in Utah, including
1372:
2288:
2467:
1012:
mountains. Elevation varies from 4,800 to 9,700 feet (1,463 to 2,957 m). Finely textured soils support big sagebrush, low sagebrush, antelope bitterbrush, serviceberry, snowberry,
2343:
658:. The region covers 943 square miles (2,442 km) in southeastern Idaho and 126 square miles (326 km) in northwestern Utah, including land within the Sawtooth and Caribou-Targhee national forests.
2420:
2508:
2167:
1510:
1892:
992:
includes scattered hills, low mountains, volcanic cones, buttes, and rocky outcrops that rise out of the drier
Dissected High Lava Plateau and High Lava Plains, as well as midelevation zones in the
2363:
1897:
2404:
2075:
1907:
1065:, Owyhee, and Steens mountains, from 6,500 to 10,900 feet (1,981 to 3,322 m). These are partially glaciated, high, rugged mountains with glacial features including
2323:
2283:
2187:
2172:
2019:
630:
is composed of steep, rugged, unglaciated mountains with cold winters, at an elevation of 6,000 to 9,900 feet (1,829 to 3,018 m). It is characterized by a mix of
2498:
2268:
2263:
2162:
2127:
834:. Elevation varies from 2,500 to 6,600 feet (762 to 2,012 m). Although the region's climate and vegetation are similar to the Dissected High Lava Plateau, its
1145:
in the late 19th century. The region covers 105 square miles (272 km) in Nevada, 103 square miles (267 km) in Oregon, and 38 square miles (98 km) in Idaho, and contains the
2278:
1045:. The region covers 3,151 square miles (8,161 km) in Nevada, 1,041 square miles (2,696 km) in Oregon, and 550 square miles (1,424 km) in Idaho. Public lands include the
2472:
2328:
2223:
718:, Great Basin wildrye, bottlebrush squirreltail, Indian ricegrass, Sandberg's bluegrass, Thurber's needlegrass, and cheatgrass. The land is used for rangeland and sprinkler-irrigated
541:
mountain slopes, hills, and alluvial fans at an elevation of 4,600 to 9,000 feet (1,402 to 2,743 m). The region is covered by mountain big sagebrush,
2197:
2003:
1988:
2482:
2303:
2070:
2513:
2503:
2338:
2293:
1973:
1968:
1948:
1998:
1958:
122:
783:, bluebunch wheatgrass, basin wildrye, Idaho fescue, Thurber's needlegrass, and cheatgrass. The region covers 1,651 square miles (4,276 km) in Oregon, including the
181:
1993:
1902:
1853:
1018:
545:, and associated grasses and understory plants, including bluebunch wheatgrass, Sandberg bluegrass, Great Basin wildrye, Indian ricegrass, cheatgrass, Idaho fescue,
1174:, and a few hills. Soils, climate, and vegetation are transitional to the Central Basin and Range to the south. Characteristically, the basin floors have strongly
408:, as described below. Level IV mapping is not yet complete in California, and the information below includes only the sections in Oregon, Idaho, Nevada, and Utah.
1120:, and wet depressions. The understory features low juniper, mountain big sagebrush, mountain brush, serviceberry, snowberry, mountain-mahogany, Idaho fescue,
879:. Elevation varies from 4,200 to 6,800 feet (1,280 to 2,073 m). The region is similar to the Dissected High Lava Plateau in its
17:
2368:
1222:
of less than 100 feet (30 m). On the playas, lake levels and salinity fluctuate seasonally and yearly. Playas are ponded during wet intervals and
908:
lives in permanent, shallow, weedy lakes and spawns in Nevada's
Twelvemile Creek. The Wall Canyon area supports a unique fish species, the Wall Canyon
2608:
1938:
102:
674:
during the
Pleistocene epoch that have now mostly disappeared. It is characterized by gently sloping, internally drained basins with lake terraces,
1218:, three of the most arid areas in Oregon. Elevation varies from 4,500 to 5,000 feet (1,372 to 1,524 m), with a local
799:, and the Warner Lakes. It also includes 105 square miles (272 km) in Idaho and 56 square miles (145 km) in Nevada, on and around the
2558:
504:
tend to be more extensive and in better condition than at similar elevations in the
Central Basin and Range. Cheatgrass has replaced depleted
2656:
2525:
1863:
1846:
1570:
1546:
405:
223:
219:
1386:
2677:
2353:
2248:
2298:
2142:
2029:
1541:
2682:
2106:
1839:
1535:
686:. Elevation varies from 4,200 to 6,200 feet (1,280 to 1,890 m). Some basin floor playas collect and
2389:
1963:
127:
2394:
2348:
2157:
1453:
937:
1471:
2333:
2218:
2024:
557:. Scattered juniper woodlands grow on shallow and rocky soils. These hills represent the northern limit for both pinyon and
2213:
1490:
1190:, rushes, basin wildrye, bottlebrush squirreltail, and cheatgrass. Alluvial fans and hills support Wyoming big sagebrush,
2687:
2090:
2055:
294:
117:
2551:
2399:
2358:
2258:
2060:
722:
farming. The region covers 2,092 square miles (5,418 km) in Oregon and 342 square miles (886 km) in Nevada.
2712:
2692:
2152:
1802:
1750:
1692:
1632:
2452:
2132:
1580:
1279:
1096:. Annual precipitation is sufficient to support a Great Basin pine forest community of Douglas-fir, subalpine fir,
1046:
933:
784:
1371:
2436:
2308:
2177:
2122:
1817:
1765:
1707:
1647:
1166:, and retain water seasonally. They are flanked by bajadas and alluvial fans. The region also contains wetlands,
615:
565:
replaces them to the west and north. Groves of aspen grow on alluvial fans and along stream networks, with some
2080:
1037:
are found in the Santa Rosa range. Extensive gold mining operations continue, especially in the mountains near
800:
2707:
2639:
2618:
2587:
2544:
2373:
2050:
1983:
1887:
888:
286:
112:
593:
and other fish. Water quality has been lightly to moderately degraded by human activities, such as historic
2634:
2568:
2457:
2318:
2045:
1551:
1419:
714:. Better drained, less alkaline soils are dominated by Wyoming big sagebrush and basin big sagebrush, with
607:
394:
1401:
1308:
747:
region hold water more consistently than on the coarser, better drained soils of the
Pluvial Lake Basins.
2582:
2243:
2233:
2147:
1953:
1392:
590:
537:
is higher and more rugged than the sagebrush plains and basins of neighboring regions. It is composed of
445:
1808:
1756:
1698:
1638:
1322:
27:
This article is about the ecoregion designated by the EPA. For the associated geographical feature, see
2702:
2613:
2253:
1978:
1943:
1823:
1771:
1713:
1653:
1294:
107:
2697:
2065:
1933:
1882:
398:
97:
883:, climate, and vegetation, but, unlike the plateau, it is internally drained. As a result, it lacks
2462:
2192:
1585:
1565:
1314:
1034:
976:
ecoregion consists of gently sloping, unforested terraces, basin rims, valley bottoms, footslopes,
611:
473:
469:
2477:
2137:
1877:
1521:
1328:
546:
481:
1251:
1081:
and springs, supporting federally threatened bull trout and
Lahontan cutthroat trout in Nevada.
2313:
1265:
1062:
902:
690:
water seasonally, but not as extensively as the High Desert Wetlands. Dry lake beds near the
501:
449:
1831:
2603:
2182:
1928:
1411:
1211:
1207:
898:
792:
735:
683:
461:
49:
58:
8:
1559:
1350:
1336:
1285:
1146:
1022:
477:
457:
416:
397:
and the Snake River Plain ecoregions. Most public lands in the region are managed by the
74:
2659:
2528:
1822: (color poster with map, descriptive text, summary tables, and photographs; with a
1770: (color poster with map, descriptive text, summary tables, and photographs; with a
1712: (color poster with map, descriptive text, summary tables, and photographs; with a
1652: (color poster with map, descriptive text, summary tables, and photographs; with a
2228:
1342:
1005:
779:
occur in wetter areas. Drier areas support basin big sagebrush, Wyoming big sagebrush,
715:
465:
420:
Level IV ecoregions in the Northern Basin and Range in Oregon, Idaho, Utah, and Nevada.
348:
304:, which once inundated the Central Basin and Range. The western part of the region is
1183:
1042:
1014:
691:
251:
887:
runs. It also differs from the plateau in having numerous intermittent lakes on the
2238:
1228:
1179:
1038:
1021:. The density and extent of juniper varies over time and is dependent on long-term
1009:
1001:
760:
756:
703:
647:
522:
485:
344:
320:
2536:
1407:
997:
884:
603:
562:
453:
375:
305:
301:
1132:, mountain brome, bluebunch wheatgrass, and Sandberg bluegrass. Small areas of
1105:
1097:
1030:
839:
780:
743:
679:
566:
309:
270:
79:
964:
drainage. The land is used primarily for rangeland and irrigated agriculture.
297:
to the south. Its southern boundary is determined by the highest shoreline of
2671:
1482:
1463:
1356:
1300:
1215:
1191:
1137:
993:
905:
891:
872:
852:
768:
711:
651:
578:
574:
542:
514:
448:
and colder winters. Potential natural vegetation is mostly sagebrush steppe;
196:
183:
871:
is a vast, nearly level to undulating sagebrush steppe containing scattered
1271:
1125:
1121:
1117:
977:
921:
880:
856:
848:
788:
764:
695:
570:
558:
554:
352:
262:
1061:
occupies the elevational belt above the Semiarid Uplands on the Jarbidge,
1497:
1425:
1257:
1232:
1175:
1163:
1101:
1086:
1074:
913:
844:
635:
594:
493:
404:
The Northern Basin and Range ecoregion has been subdivided into fourteen
390:
356:
313:
298:
274:
227:
28:
1459:
1377:
1187:
1167:
1026:
961:
925:
909:
824:
816:
796:
748:
699:
509:
505:
497:
489:
254:
247:
43:
585:
that have been designated for protection as critical or high priority
1501:
1109:
957:
953:
835:
687:
550:
518:
379:
368:
360:
332:
328:
282:
1231:. The region covers 179 square miles (464 km) in Oregon. It is
1077:. Perennial or intermittent, high gradient, cold streams are fed by
642:, bluegrass, and bluebunch wheatgrass. Open grassland grows on wide
1478:
1078:
917:
820:
707:
675:
599:
382:
340:
324:
1223:
1219:
1093:
1090:
1066:
901:. Shallow and rocky soils support scattered western juniper. The
894:
827:
752:
739:
719:
631:
586:
538:
437:
371:
336:
290:
1517:
1133:
1113:
1082:
1070:
929:
772:
655:
639:
582:
441:
434:
266:
239:
231:
1447:
Sagebrush-Steppe in south-central Idaho along Three Creek Road
621:
2020:
6 Southern and Central California Chaparral and Oak Woodlands
1861:
1142:
1129:
876:
643:
364:
235:
815:
is a sagebrush steppe containing deep river canyons, barren
1171:
940:. Contiguous areas in California have not been mapped yet.
831:
671:
525:. Contiguous areas in California have not been mapped yet.
386:
278:
258:
243:
289:
to the north and has more available moisture and a cooler
776:
528:
1235:
and is used for recreation and migratory bird habitat.
424:
943:
806:
2566:
2274:56 Southern Michigan/Northern Indiana Drift Plains
1052:
1755:Bryce, SA; Woods, AJ; Morefield, JD; et al.
1697:McGrath, CL; Woods, AJ; Omernik, JM; et al.
1637:Thorson, TD; Bryce, SA; Lammers, DA; et al.
967:
2669:
2143:29 Central Oklahoma/Texas Plains (Cross Timbers)
1913:120 Coastal Western Hemlock-Sitka Spruce Forests
1049:and the Hart Mountain National Antelope Refuge.
1807:Woods, AJ; Lammers, DA; Bryce, SA; et al.
1754:
1696:
1636:
628:High Elevation Forests and Shrublands ecoregion
1562:maintains an alternate classification system:
742:that provide critical habitat for nesting and
496:woodlands grow on rocky and gravelly uplands.
2657:United States Environmental Protection Agency
2552:
2526:United States Environmental Protection Agency
1847:
1806:
1571:List of ecoregions in the United States (WWF)
1547:List of ecoregions in the United States (EPA)
725:
224:United States Environmental Protection Agency
661:
385:are found in some areas, but in general the
2289:60 Northern Appalachian Plateau and Uplands
1152:
682:, intermittent lakes, fan skirts, and cool
622:High Elevation Forests and Shrublands (80c)
2559:
2545:
2468:104 Interior Forested Lowlands and Uplands
2369:83 Eastern Great Lakes and Hudson Lowlands
1854:
1840:
1622:
535:Semiarid Hills and Low Mountains ecoregion
1740:
1738:
1736:
1734:
1732:
1730:
1728:
1726:
1724:
1722:
1682:
1620:
1618:
1616:
1614:
1612:
1610:
1608:
1606:
1604:
1602:
1542:List of ecoregions in North America (CEC)
1149:in the Humboldt-Toiyabe National Forest.
983:
862:
103:Eastern Cascades Slopes and Foothills (9)
1680:
1678:
1676:
1674:
1672:
1670:
1668:
1666:
1664:
1662:
1536:Commission for Environmental Cooperation
415:
367:. Today, most of the region is used for
2609:9 Eastern Cascades Slopes and Foothills
1939:9 Eastern Cascades Slopes and Foothills
1792:
1790:
1788:
1786:
1784:
1782:
1780:
14:
2670:
1719:
1599:
1534:Ecoregions defined by the EPA and the
1206:includes the playas and sand dunes of
1197:
938:Hart Mountain National Antelope Refuge
529:Semiarid Hills and Low Mountains (80b)
411:
2540:
2259:53 Southeastern Wisconsin Till Plains
1835:
1659:
1178:and very alkaline soils that support
431:Dissected High Lava Plateau ecoregion
347:. The mountain ranges are covered in
1777:
950:Saltbush-Dominated Valleys ecoregion
813:Owyhee Uplands and Canyons ecoregion
18:Northern Basin and Range (ecoregion)
2344:72 Interior River Valleys and Hills
1380:, found in juniper-pinyon woodlands
1059:Partly Forested Mountains ecoregion
24:
2678:Northern Basin and Range ecoregion
2354:74 Mississippi Valley Loess Plains
1033:watershed, and limited numbers of
216:Northern Basin and Range ecoregion
37:Northern Basin and Range ecoregion
25:
2724:
2509:112 Bristol Bay-Nushagak Lowlands
2421:76 Southern Florida Coastal Plain
2249:51 North Central Hardwood Forests
1577:Colloquial terms for the region:
1516:Sagebrush steppe in northeastern
425:Dissected High Lava Plateau (80a)
2374:84 Atlantic Coastal Pine Barrens
2299:63 Middle Atlantic Coastal Plain
2168:42 Northwestern Glaciated Plains
1893:111 Ahklun and Kilbuck Mountains
1801: This article incorporates
1796:
1749: This article incorporates
1744:
1691: This article incorporates
1686:
1631: This article incorporates
1626:
1581:Basin and Range (disambiguation)
1509:
1489:
1470:
1452:
1440:
1418:
1400:
1385:
1370:
1349:
1335:
1321:
1307:
1293:
1278:
1264:
1250:
1047:Humboldt-Toiyabe National Forest
944:Saltbush-Dominated Valleys (80h)
934:Sheldon National Wildlife Refuge
807:Owyhee Uplands and Canyons (80f)
785:Malheur National Wildlife Refuge
128:Wasatch and Uinta Mountains (19)
57:
42:
2683:Ecoregions of the United States
2597:Northwestern Forested Mountains
2107:23 Arizona/New Mexico Mountains
2030:8 Southern California Mountains
1922:Northwestern Forested Mountains
1864:Ecoregions in the United States
1818:United States Geological Survey
1766:United States Geological Survey
1708:United States Geological Survey
1648:United States Geological Survey
1112:, and aspen stands in riparian
1053:Partly Forested Mountains (80k)
331:are common, in contrast to the
2390:49 Northern Minnesota Wetlands
2364:82 Laurentian Plains and Hills
1964:19 Wasatch and Uinta Mountains
1898:113 Alaska Peninsula Mountains
968:Sagebrush Steppe Valleys (80i)
801:Duck Valley Indian Reservation
732:High Desert Wetlands ecoregion
285:is higher and cooler than the
13:
1:
2405:62 North Central Appalachians
2395:50 Northern Lakes and Forests
2349:73 Mississippi Alluvial Plain
2158:34 Western Gulf Coastal Plain
2076:22 Arizona/New Mexico Plateau
1908:119 Pacific Coastal Mountains
1593:
1433:
668:Pluvial Lake Basins ecoregion
433:is a broad to gently rolling
63:Northern Basin and Range (80)
2499:109 Subarctic Coastal Plains
2430:Southern Semi-Arid Highlands
2334:70 Western Allegheny Plateau
2324:68 Southwestern Appalachians
2284:59 Northeastern Coastal Zone
2269:55 Eastern Corn Belt Plains
2219:33 East Central Texas Plains
2188:46 Northern Glaciated Plains
2173:43 Northwestern Great Plains
1552:List of ecoregions in Oregon
1159:Salt Shrub Valleys ecoregion
1128:, bottlebrush squirreltail,
936:and lower elevations in the
694:have a significant layer of
608:Fort Hall Indian Reservation
273:in the northern part of the
118:Central Basin and Range (13)
7:
2645:80 Northern Basin and Range
2264:54 Central Corn Belt Plains
2214:32 Texas Blackland Prairies
2193:47 Western Corn Belt Plains
2163:40 Central Irregular Plains
2086:80 Northern Basin and Range
2025:7 Central California Valley
1528:
1393:Yellowstone cutthroat trout
610:and public land within the
591:Yellowstone cutthroat trout
517:. It is primarily used for
10:
2729:
2688:Ecology of the Great Basin
2128:26 Southwestern Tablelands
2091:81 Sonoran Basin and Range
2056:13 Central Basin and Range
1238:
990:Semiarid Uplands ecoregion
869:High Lava Plains ecoregion
726:High Desert Wetlands (80e)
440:cut by deep, sheer-walled
26:
2653:
2627:
2596:
2575:
2522:
2491:
2445:
2429:
2413:
2400:58 Northeastern Highlands
2382:
2359:75 Southern Coastal Plain
2279:57 Huron/Erie Lake Plains
2206:
2115:
2099:
2061:14 Mojave Basin and Range
2038:
2012:
1921:
1870:
1395:in the Snake River system
662:Pluvial Lake Basins (80d)
456:are abundant, as well as
399:Bureau of Land Management
175:
149:
141:
136:
85:
73:
68:
56:
41:
36:
2713:Basin and Range Province
2693:Ecoregions of California
2576:Marine West Coast Forest
2473:106 Interior Bottomlands
2453:101 Arctic Coastal Plain
2207:Eastern Temperate Forest
2153:31 Southern Texas Plains
2013:Mediterranean California
1871:Marine West Coast Forest
1586:Basin and Range Province
1566:List of ecoregions (WWF)
1363:
1315:Bottlebrush squirreltail
1243:
1153:Salt Shrub Valleys (80l)
1035:Lahontan cutthroat trout
1019:juniper steppe woodlands
974:Sagebrush Steppe Valleys
474:bottlebrush squirreltail
343:occurs on rugged, stony
2329:69 Central Appalachians
2224:35 South Central Plains
2133:27 Central Great Plains
1558:The conservation group
1428:in shrub-steppe habitat
1329:Needle-and-thread grass
1204:Barren Playas ecoregion
547:needle-and-thread grass
500:species are denser and
295:Central Basin and Range
2628:North American Deserts
2437:79 Madrean Archipelago
2309:65 Southeastern Plains
2178:44 Nebraska Sand Hills
2123:25 Western High Plains
2039:North American Deserts
2004:118 Wrangell Mountains
1989:105 Interior Highlands
1803:public domain material
1751:public domain material
1693:public domain material
1633:public domain material
1496:Cheatgrass covers the
984:Semiarid Uplands (80j)
863:High Lava Plains (80g)
738:lakes and surrounding
654:may be found in upper
581:. The region includes
502:biological soil crusts
421:
389:are less suitable for
335:of the Central Basin.
113:Snake River Plain (12)
2483:108 Ogilvie Mountains
2229:36 Ouachita Mountains
2198:48 Lake Agassiz Plain
2081:24 Chihuahuan Deserts
787:and land surrounding
470:Thurber's needlegrass
450:Wyoming big sagebrush
419:
2708:Ecoregions of Oregon
2640:12 Snake River Plain
2619:78 Klamath Mountains
2569:Ecoregions in Oregon
2514:114 Aleutian Islands
2504:110 Seward Peninsula
2458:102 Arctic Foothills
2414:Tropical Wet Forests
2304:64 Northern Piedmont
2071:20 Colorado Plateaus
2051:12 Snake River Plain
1984:78 Klamath Mountains
1758:Ecoregions of Nevada
1640:Ecoregions of Oregon
1198:Barren Playas (80m)
1182:, inland saltgrass,
1141:grazing by domestic
1023:climate fluctuations
920:, historic gold and
903:federally threatened
830:that are riddled by
577:are also present in
482:Sandberg's bluegrass
462:bluebunch wheatgrass
319:The valleys support
2635:10 Columbia Plateau
2588:3 Willamette Valley
2339:71 Interior Plateau
2319:67 Ridge and Valley
2294:61 Erie Drift Plain
2239:38 Boston Mountains
2046:10 Columbia Plateau
1974:41 Canadian Rockies
1969:21 Southern Rockies
1949:15 Northern Rockies
1888:3 Willamette Valley
1700:Ecoregions of Idaho
1560:World Wildlife Fund
1286:Western chokecherry
1147:Jarbidge Wilderness
478:Great Basin wildrye
458:Douglas rabbitbrush
412:Level IV ecoregions
406:Level IV ecoregions
220:Level III ecoregion
193: /
123:Middle Rockies (17)
108:Blue Mountains (11)
2655:as defined by the
2524:as defined by the
2244:39 Ozark Highlands
2234:37 Arkansas Valley
2148:30 Edwards Plateau
1999:117 Copper Plateau
1954:16 Idaho Batholith
1810:Ecoregions of Utah
1343:Rubber rabbitbrush
1288:leaves and berries
932:. It contains the
906:Warner sucker fish
716:rubber rabbitbrush
618:national forests.
466:western wheatgrass
422:
393:than those in the
349:mountain sagebrush
306:internally drained
222:designated by the
2703:Regions of Nevada
2665:
2664:
2614:11 Blue Mountains
2534:
2533:
2254:52 Driftless Area
2100:Temperate Sierras
1979:77 North Cascades
1959:17 Middle Rockies
1944:11 Blue Mountains
1029:are found in the
1015:mountain-mahogany
791:, Paulina Marsh,
730:The nearly level
692:Cascade Mountains
569:and Douglas-fir.
287:Snake River Plain
212:
211:
98:Sierra Nevada (5)
48:Salt deposits at
16:(Redirected from
2720:
2698:Regions of Idaho
2561:
2554:
2547:
2538:
2537:
2463:103 Brooks Range
2383:Northern Forests
2066:18 Wyoming Basin
1994:116 Alaska Range
1856:
1849:
1842:
1833:
1832:
1827:
1821:
1815:
1800:
1799:
1794:
1775:
1769:
1763:
1748:
1747:
1742:
1717:
1711:
1705:
1690:
1689:
1684:
1657:
1651:
1645:
1630:
1629:
1624:
1513:
1493:
1474:
1456:
1444:
1422:
1404:
1389:
1374:
1353:
1339:
1325:
1311:
1297:
1282:
1268:
1254:
1229:black greasewood
1180:black greasewood
838:is more varied,
781:silver sagebrush
777:Nevada bluegrass
773:creeping wildrye
761:tufted hairgrass
757:black greasewood
704:inland saltgrass
678:, beach plains,
648:Engelmann spruce
523:wildlife habitat
486:Indian ricegrass
460:, Idaho fescue,
395:Columbia Plateau
321:sagebrush steppe
269:, and scattered
208:
207:
205:
204:
203:
198:
194:
191:
190:
189:
186:
61:
46:
34:
33:
21:
2728:
2727:
2723:
2722:
2721:
2719:
2718:
2717:
2668:
2667:
2666:
2661:
2649:
2623:
2592:
2571:
2565:
2535:
2530:
2518:
2487:
2478:107 Yukon Flats
2441:
2425:
2409:
2378:
2202:
2111:
2095:
2034:
2008:
1934:5 Sierra Nevada
1917:
1883:2 Puget Lowland
1866:
1860:
1830:
1813:
1797:
1795:
1778:
1761:
1745:
1743:
1720:
1703:
1687:
1685:
1660:
1643:
1627:
1625:
1600:
1596:
1531:
1524:
1514:
1505:
1494:
1485:
1481:surface of the
1475:
1466:
1457:
1448:
1445:
1436:
1429:
1423:
1414:
1408:American avocet
1405:
1396:
1390:
1381:
1375:
1366:
1359:
1354:
1345:
1340:
1331:
1326:
1317:
1312:
1303:
1298:
1289:
1283:
1274:
1269:
1260:
1255:
1246:
1241:
1200:
1155:
1055:
986:
970:
946:
885:anadromous fish
865:
809:
728:
680:stream terraces
670:contained vast
664:
624:
616:Caribou-Targhee
563:western juniper
531:
454:black sagebrush
427:
414:
302:Lake Bonneville
271:mountain ranges
201:
199:
195:
192:
187:
184:
182:
180:
179:
171:
132:
94:
93:
64:
52:
32:
23:
22:
15:
12:
11:
5:
2726:
2716:
2715:
2710:
2705:
2700:
2695:
2690:
2685:
2680:
2663:
2662:
2654:
2651:
2650:
2648:
2647:
2642:
2637:
2631:
2629:
2625:
2624:
2622:
2621:
2616:
2611:
2606:
2600:
2598:
2594:
2593:
2591:
2590:
2585:
2579:
2577:
2573:
2572:
2564:
2563:
2556:
2549:
2541:
2532:
2531:
2523:
2520:
2519:
2517:
2516:
2511:
2506:
2501:
2495:
2493:
2489:
2488:
2486:
2485:
2480:
2475:
2470:
2465:
2460:
2455:
2449:
2447:
2443:
2442:
2440:
2439:
2433:
2431:
2427:
2426:
2424:
2423:
2417:
2415:
2411:
2410:
2408:
2407:
2402:
2397:
2392:
2386:
2384:
2380:
2379:
2377:
2376:
2371:
2366:
2361:
2356:
2351:
2346:
2341:
2336:
2331:
2326:
2321:
2316:
2311:
2306:
2301:
2296:
2291:
2286:
2281:
2276:
2271:
2266:
2261:
2256:
2251:
2246:
2241:
2236:
2231:
2226:
2221:
2216:
2210:
2208:
2204:
2203:
2201:
2200:
2195:
2190:
2185:
2180:
2175:
2170:
2165:
2160:
2155:
2150:
2145:
2140:
2138:28 Flint Hills
2135:
2130:
2125:
2119:
2117:
2113:
2112:
2110:
2109:
2103:
2101:
2097:
2096:
2094:
2093:
2088:
2083:
2078:
2073:
2068:
2063:
2058:
2053:
2048:
2042:
2040:
2036:
2035:
2033:
2032:
2027:
2022:
2016:
2014:
2010:
2009:
2007:
2006:
2001:
1996:
1991:
1986:
1981:
1976:
1971:
1966:
1961:
1956:
1951:
1946:
1941:
1936:
1931:
1925:
1923:
1919:
1918:
1916:
1915:
1910:
1905:
1903:115 Cook Inlet
1900:
1895:
1890:
1885:
1880:
1874:
1872:
1868:
1867:
1859:
1858:
1851:
1844:
1836:
1829:
1828:
1776:
1718:
1658:
1597:
1595:
1592:
1591:
1590:
1589:
1588:
1583:
1575:
1574:
1573:
1568:
1556:
1555:
1554:
1549:
1544:
1530:
1527:
1526:
1525:
1515:
1508:
1506:
1495:
1488:
1486:
1476:
1469:
1467:
1458:
1451:
1449:
1446:
1439:
1435:
1432:
1431:
1430:
1424:
1417:
1415:
1406:
1399:
1397:
1391:
1384:
1382:
1376:
1369:
1365:
1362:
1361:
1360:
1355:
1348:
1346:
1341:
1334:
1332:
1327:
1320:
1318:
1313:
1306:
1304:
1299:
1292:
1290:
1284:
1277:
1275:
1270:
1263:
1261:
1256:
1249:
1245:
1242:
1240:
1237:
1199:
1196:
1188:alkali sacaton
1154:
1151:
1138:alpine meadows
1130:prairie lupine
1106:whitebark pine
1098:ponderosa pine
1085:segments have
1054:
1051:
1031:Jarbidge River
985:
982:
969:
966:
945:
942:
873:volcanic cones
864:
861:
840:stream density
808:
805:
727:
724:
712:alkaline soils
663:
660:
640:mountain brome
623:
620:
579:riparian areas
567:lodgepole pine
530:
527:
426:
423:
413:
410:
329:Mollisol soils
312:drains to the
310:stream network
308:; its eastern
250:. It contains
210:
209:
177:
173:
172:
170:
169:
166:
163:
160:
157:
153:
151:
147:
146:
143:
139:
138:
134:
133:
131:
130:
125:
120:
115:
110:
105:
100:
91:
90:
89:
87:
83:
82:
77:
71:
70:
66:
65:
62:
54:
53:
47:
39:
38:
9:
6:
4:
3:
2:
2725:
2714:
2711:
2709:
2706:
2704:
2701:
2699:
2696:
2694:
2691:
2689:
2686:
2684:
2681:
2679:
2676:
2675:
2673:
2660:
2658:
2652:
2646:
2643:
2641:
2638:
2636:
2633:
2632:
2630:
2626:
2620:
2617:
2615:
2612:
2610:
2607:
2605:
2602:
2601:
2599:
2595:
2589:
2586:
2584:
2583:1 Coast Range
2581:
2580:
2578:
2574:
2570:
2562:
2557:
2555:
2550:
2548:
2543:
2542:
2539:
2529:
2527:
2521:
2515:
2512:
2510:
2507:
2505:
2502:
2500:
2497:
2496:
2494:
2490:
2484:
2481:
2479:
2476:
2474:
2471:
2469:
2466:
2464:
2461:
2459:
2456:
2454:
2451:
2450:
2448:
2444:
2438:
2435:
2434:
2432:
2428:
2422:
2419:
2418:
2416:
2412:
2406:
2403:
2401:
2398:
2396:
2393:
2391:
2388:
2387:
2385:
2381:
2375:
2372:
2370:
2367:
2365:
2362:
2360:
2357:
2355:
2352:
2350:
2347:
2345:
2342:
2340:
2337:
2335:
2332:
2330:
2327:
2325:
2322:
2320:
2317:
2315:
2314:66 Blue Ridge
2312:
2310:
2307:
2305:
2302:
2300:
2297:
2295:
2292:
2290:
2287:
2285:
2282:
2280:
2277:
2275:
2272:
2270:
2267:
2265:
2262:
2260:
2257:
2255:
2252:
2250:
2247:
2245:
2242:
2240:
2237:
2235:
2232:
2230:
2227:
2225:
2222:
2220:
2217:
2215:
2212:
2211:
2209:
2205:
2199:
2196:
2194:
2191:
2189:
2186:
2184:
2181:
2179:
2176:
2174:
2171:
2169:
2166:
2164:
2161:
2159:
2156:
2154:
2151:
2149:
2146:
2144:
2141:
2139:
2136:
2134:
2131:
2129:
2126:
2124:
2121:
2120:
2118:
2114:
2108:
2105:
2104:
2102:
2098:
2092:
2089:
2087:
2084:
2082:
2079:
2077:
2074:
2072:
2069:
2067:
2064:
2062:
2059:
2057:
2054:
2052:
2049:
2047:
2044:
2043:
2041:
2037:
2031:
2028:
2026:
2023:
2021:
2018:
2017:
2015:
2011:
2005:
2002:
2000:
1997:
1995:
1992:
1990:
1987:
1985:
1982:
1980:
1977:
1975:
1972:
1970:
1967:
1965:
1962:
1960:
1957:
1955:
1952:
1950:
1947:
1945:
1942:
1940:
1937:
1935:
1932:
1930:
1927:
1926:
1924:
1920:
1914:
1911:
1909:
1906:
1904:
1901:
1899:
1896:
1894:
1891:
1889:
1886:
1884:
1881:
1879:
1878:1 Coast Range
1876:
1875:
1873:
1869:
1865:
1857:
1852:
1850:
1845:
1843:
1838:
1837:
1834:
1825:
1819:
1812:
1811:
1804:
1793:
1791:
1789:
1787:
1785:
1783:
1781:
1773:
1767:
1760:
1759:
1752:
1741:
1739:
1737:
1735:
1733:
1731:
1729:
1727:
1725:
1723:
1715:
1709:
1702:
1701:
1694:
1683:
1681:
1679:
1677:
1675:
1673:
1671:
1669:
1667:
1665:
1663:
1655:
1649:
1642:
1641:
1634:
1623:
1621:
1619:
1617:
1615:
1613:
1611:
1609:
1607:
1605:
1603:
1598:
1587:
1584:
1582:
1579:
1578:
1576:
1572:
1569:
1567:
1564:
1563:
1561:
1557:
1553:
1550:
1548:
1545:
1543:
1540:
1539:
1537:
1533:
1532:
1523:
1519:
1512:
1507:
1503:
1499:
1492:
1487:
1484:
1483:Alvord Desert
1480:
1473:
1468:
1465:
1464:Hart Mountain
1461:
1455:
1450:
1443:
1438:
1437:
1427:
1421:
1416:
1413:
1409:
1403:
1398:
1394:
1388:
1383:
1379:
1373:
1368:
1367:
1358:
1357:Spiny hopsage
1352:
1347:
1344:
1338:
1333:
1330:
1324:
1319:
1316:
1310:
1305:
1302:
1301:Big sagebrush
1296:
1291:
1287:
1281:
1276:
1273:
1267:
1262:
1259:
1253:
1248:
1247:
1236:
1234:
1230:
1225:
1221:
1217:
1216:Alvord Desert
1213:
1209:
1205:
1195:
1193:
1192:spiny hopsage
1189:
1186:, shadscale,
1185:
1184:bud sagebrush
1181:
1177:
1173:
1169:
1165:
1160:
1150:
1148:
1144:
1139:
1135:
1131:
1127:
1123:
1119:
1115:
1111:
1107:
1103:
1099:
1095:
1092:
1088:
1084:
1080:
1076:
1072:
1068:
1064:
1060:
1050:
1048:
1044:
1040:
1036:
1032:
1028:
1024:
1020:
1016:
1011:
1007:
1003:
999:
995:
991:
988:The disjunct
981:
979:
975:
965:
963:
959:
955:
951:
941:
939:
935:
931:
927:
924:, and active
923:
919:
915:
911:
907:
904:
900:
896:
893:
890:
886:
882:
878:
874:
870:
860:
858:
854:
850:
846:
841:
837:
833:
829:
826:
822:
818:
814:
804:
802:
798:
794:
790:
786:
782:
778:
774:
770:
769:meadow barley
766:
762:
758:
754:
750:
745:
741:
737:
733:
723:
721:
717:
713:
709:
705:
701:
697:
693:
689:
685:
681:
677:
673:
669:
659:
657:
653:
652:subalpine fir
649:
645:
641:
637:
633:
629:
619:
617:
613:
609:
605:
601:
596:
592:
588:
584:
580:
576:
572:
568:
564:
560:
556:
552:
548:
544:
543:low sagebrush
540:
536:
526:
524:
520:
516:
515:Owyhee Desert
511:
507:
503:
499:
495:
491:
487:
483:
479:
475:
471:
467:
463:
459:
455:
451:
447:
446:precipitation
443:
439:
436:
432:
418:
409:
407:
402:
400:
396:
392:
388:
384:
381:
377:
373:
370:
366:
362:
358:
354:
350:
346:
342:
338:
334:
330:
326:
322:
317:
315:
311:
307:
303:
300:
296:
292:
288:
284:
280:
276:
272:
268:
264:
263:alluvial fans
260:
256:
253:
249:
245:
241:
237:
233:
229:
226:(EPA) in the
225:
221:
217:
206:
178:
174:
167:
164:
161:
158:
155:
154:
152:
148:
145:United States
144:
140:
135:
129:
126:
124:
121:
119:
116:
114:
111:
109:
106:
104:
101:
99:
96:
95:
88:
84:
81:
78:
76:
72:
67:
60:
55:
51:
45:
40:
35:
30:
19:
2644:
2116:Great Plains
2085:
1824:Reverse side
1809:
1772:Reverse side
1757:
1714:Reverse side
1699:
1654:Reverse side
1639:
1477:The cracked
1460:Bunchgrasses
1272:Utah juniper
1203:
1201:
1170:, terraces,
1158:
1156:
1126:rough fescue
1122:sheep fescue
1075:tarn (lake)s
1063:Independence
1058:
1056:
989:
987:
973:
971:
949:
947:
922:silver mines
881:physiography
868:
866:
812:
810:
789:Malheur Lake
734:consists of
731:
729:
696:volcanic ash
667:
665:
627:
625:
606:land on the
575:Booth willow
571:Geyer willow
559:Utah juniper
555:serviceberry
534:
532:
506:bunchgrasses
430:
428:
403:
363:forests, or
353:Idaho fescue
327:vegetation.
318:
215:
213:
2183:45 Piedmont
1498:fault scarp
1426:Sage grouse
1412:Summer Lake
1258:Limber pine
1212:Silver Lake
1208:Summer Lake
1168:hot springs
1164:water table
1102:limber pine
914:pastureland
899:depressions
889:impermeable
859:drainages.
845:Lake Owyhee
817:lava fields
793:Summer Lake
736:high desert
636:chokecherry
595:gold mining
539:unglaciated
391:agriculture
357:Douglas-fir
339:-dominated
314:Snake River
299:Pleistocene
277:. Although
275:Great Basin
255:lava plains
228:U.S. states
200: /
176:Coordinates
50:Summer Lake
29:Great Basin
2672:Categories
2604:4 Cascades
2567:Level III
1929:4 Cascades
1862:Level III
1594:References
1434:Landscapes
1378:Pinyon jay
1214:, and the
1094:substrates
1027:bull trout
1010:Santa Rosa
962:Raft River
926:opal mines
825:tuffaceous
797:Lake Abert
700:Greasewood
510:overgrazed
498:Understory
492:. Juniper-
490:cheatgrass
257:, rolling
248:California
197:43°N 117°W
168:California
1502:Abert Rim
1233:nonarable
1110:tree line
1108:near the
1043:Tuscacora
958:winterfat
954:shadscale
928:and clay
836:lithology
765:mat muhly
744:migratory
688:evaporate
551:snowberry
519:rangeland
380:irrigated
369:livestock
361:subalpine
333:aridisols
293:than the
283:ecoregion
252:dissected
137:Geography
1529:See also
1116:, moist
1079:snowmelt
1067:moraines
1039:Jarbidge
1006:Jarbidge
930:quarries
918:cropland
892:volcanic
847:and the
828:outcrops
821:badlands
740:wetlands
710:grow in
708:seepweed
632:conifers
612:Sawtooth
600:Shoshone
383:cropland
341:woodland
325:saltbush
316:system.
202:43; -117
80:Nearctic
1239:Gallery
1114:meadows
1104:, with
1091:boulder
1071:cirques
978:bajadas
895:bedrock
853:Malheur
720:alfalfa
684:springs
656:canyons
604:Bannock
587:habitat
583:streams
513:of the
442:canyons
438:plateau
376:Dryland
372:grazing
345:uplands
337:Juniper
291:climate
267:valleys
142:Country
86:Borders
69:Ecology
2492:Tundra
1520:along
1518:Nevada
1224:eroded
1220:relief
1176:saline
1134:tundra
1100:, and
1087:cobble
1083:Riffle
1073:, and
1008:, and
1002:Owyhee
998:Steens
910:sucker
877:buttes
857:Succor
855:, and
849:Owyhee
823:, and
775:, and
753:rushes
749:Sedges
706:, and
676:playas
646:tops.
553:, and
494:pinyon
488:, and
435:basalt
281:, the
246:, and
240:Nevada
232:Oregon
162:Nevada
156:Oregon
150:States
2446:Taiga
1814:(PDF)
1805:from
1762:(PDF)
1753:from
1704:(PDF)
1695:from
1644:(PDF)
1635:from
1522:US 93
1479:playa
1364:Fauna
1244:Flora
1172:dunes
1143:sheep
1118:draws
832:caves
672:lakes
644:ridge
387:soils
365:aspen
259:hills
236:Idaho
218:is a
188:117°W
159:Idaho
75:Realm
1202:The
1157:The
1136:and
1057:The
1041:and
994:Hart
972:The
948:The
916:and
875:and
867:The
811:The
666:The
650:and
626:The
614:and
602:and
589:for
573:and
533:The
521:and
452:and
429:The
378:and
279:arid
244:Utah
214:The
185:43°N
165:Utah
92:List
1500:of
1462:on
1410:at
1089:or
508:in
323:or
230:of
2674::
1826:).
1816:.
1779:^
1774:).
1764:.
1721:^
1716:).
1706:.
1661:^
1656:).
1646:.
1601:^
1538::
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1124:,
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1004:,
1000:,
996:,
956:,
851:,
819:,
803:.
795:,
771:,
767:,
763:,
759:,
755:,
751:,
702:,
698:.
638:,
561:;
549:,
484:,
480:,
476:,
472:,
468:,
464:,
401:.
374:.
359:,
355:,
351:,
265:,
261:,
242:,
238:,
234:,
2560:e
2553:t
2546:v
1855:e
1848:t
1841:v
1820:.
1768:.
1710:.
1650:.
1504:.
31:.
20:)
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