387:
637:
310:
96:
104:
1769:
42:
1757:
151:. It is 28 miles (45 km) in length, and is much branched; many of the significant tributaries are of a similar size to the main river. The catchment area is bounded to the east by the
178:- prone to very rapid rise and fall in level depending on rainfall. Rainfall can also be very heavy and it falls on very base-poor soils leading to episodes of strongly depressed
487:
1691:
174:
of animal skins, the storage of old munitions and the use of hill-sides as artillery ranges have all added to the legacy of pollution. The river is also very
386:
269:
197:
1716:
1671:
1191:
791:
1311:
1226:
207:
139:
1331:
1231:
1096:
454:
263:
365:, an 8-mile cycle path running from Dolgellau to Morfa Mawddach, at the south side of the Barmouth railway bridge. It is managed by the
1286:
294:
the river enters a wide and sandy estuary of great beauty. The head of the estuary is marked by the confluence of the
Mawddach and
380:
in the 18th century and probably for some centuries before. There is no evidence remaining of this activity in the estuary today.
393:
337:
The valley occupied by the present
Mawddach was later infilled by coarse-grained sub-glacial and pro-glacial deposits. In the
1709:
1704:
1061:
480:
PhD thesis: An integrated
Meteorological/Hydrological Model for the Mawddach Catchment. Graham Hall, Bangor University
538:
366:
1696:
166:
The
Mawddach has been the site of significant industrialisation and land management. Gold mining and subsequently
266:, a large tributary which has also been impacted by similar problems to the Eden and is very acidic and peaty.
1741:
1799:
1676:
190:
fishery and the countryside through which it flows is some of the most spectacular and scenic in the UK.
1794:
1726:
1686:
1487:
449:
1681:
1655:
1736:
1051:
327:
17:
1731:
1056:
1071:
531:
350:
459:
1477:
8:
1371:
1091:
781:
761:
1721:
1549:
1386:
1276:
971:
581:
436:
The late devensian and holocene evolution of
Barmouth Bay, Wales, Piers Larcombe, 1994
1503:
1467:
1126:
1086:
1046:
736:
726:
576:
278:
is a major tributary joining from the east and which drains a large area out towards
249:
171:
349:
The southern bank of the
Mawddach estuary, along which used to run a section of the
1761:
1650:
1518:
1513:
1381:
1266:
1261:
1246:
1236:
1186:
524:
237:
160:
236:- its headwaters known as Afon Crawcwellt - a large tributary draining from below
1564:
1406:
1361:
1271:
956:
806:
731:
566:
323:
303:
227:
479:
341:(12,000 BP - present), gravel from the Irish Sea was introduced to the estuary.
1640:
1614:
1604:
1523:
1508:
1316:
1201:
996:
931:
896:
861:
681:
362:
122:
1788:
1624:
1584:
1472:
1366:
1346:
1291:
1216:
966:
871:
786:
561:
502:
489:
377:
245:
108:
636:
1773:
1645:
1594:
1579:
1176:
1136:
1131:
1121:
1036:
1001:
886:
866:
836:
831:
741:
691:
686:
401:
279:
167:
152:
1619:
1599:
1589:
1574:
1554:
1482:
1436:
1401:
1396:
1356:
1326:
1296:
1251:
1181:
1101:
1081:
1066:
901:
891:
826:
801:
701:
397:
295:
72:
475:
Mawddachestuary.co.uk - Events and
Activities along the Mawddach Estuary
1609:
1569:
1559:
1528:
1421:
1351:
1336:
1321:
1151:
1146:
1106:
1041:
1026:
1006:
981:
946:
941:
936:
911:
881:
721:
661:
651:
616:
601:
586:
275:
465:
The
Mawddach Trail - The 'Railway Walk' between Dolgellau and Barmouth
1544:
1376:
1221:
1171:
1166:
1156:
1141:
1031:
1021:
1016:
1011:
991:
986:
906:
856:
851:
811:
771:
676:
656:
596:
591:
291:
241:
233:
201:
193:
The main tributaries starting in the west and working clockwise are:
148:
474:
95:
1431:
1416:
1411:
1391:
1341:
1241:
1211:
1076:
976:
961:
951:
926:
921:
876:
796:
776:
766:
746:
706:
696:
671:
666:
621:
571:
370:
358:
338:
299:
211:
103:
87:
470:
The
Mawddach Way: A 50km Circular Walk around the Mawddach Estuary
309:
1301:
1281:
1206:
1196:
1161:
1116:
1111:
846:
821:
756:
606:
547:
464:
218:
woods before descending towards the main river down
Rhaeadr Ddu (
156:
144:
134:
369:
as a leisure route for walkers and cyclists, and is part of the
41:
1451:
1446:
1441:
1306:
1256:
841:
816:
751:
716:
711:
469:
354:
257:
183:
1426:
916:
626:
611:
331:
187:
130:
60:
253:
223:
516:
215:
455:
Aerial photograph of Cadair Idris and the river Mawddach
179:
272:
which joins south of the Gain is similar but smaller.
248:
forest. This tributary has been severely affected by
214:
after following a tumultuous valley through ancient
376:The estuary of the Mawddach was a great centre of
1786:
182:. Despite this, the river sustains an important
532:
222:). This valley has one of the more important
137:, Wales, which has its source in a wide area
159:dome which forms a watershed just south of
422:Thomas, Peter; Howe, George Melvyn (1968).
114:
539:
525:
421:
170:have had major impacts but forestry, the
46:The Mawddach looking west to Barmouth Bay
326:which was flooded by the sea during the
308:
155:massif and to the west and north by the
102:
94:
322:The Mawddach estuary was formed from a
14:
1787:
520:
200:which drains Llyn Cwm Mynach on the
415:
313:A view across the Mawddach Estuary
24:
1062:Llanfihangel-y-Pennant, Dolbenmaen
25:
1811:
443:
396:Panorama of the Mawddach towards
1767:
1755:
635:
385:
344:
40:
230:communities in the southern UK.
99:Waterfall on the Mawddach, 1816
430:
361:, has now been designated the
298:. At its mouth is the town of
13:
1:
408:
367:Eryri National Park Authority
67:Physical characteristics
1717:Registered parks and gardens
1672:Parliamentary constituencies
7:
546:
424:Welsh Landforms and Scenery
373:Cross-Wales Cycling Route.
83: • location
10:
1816:
1387:Tal-y-bont (near Barmouth)
317:
285:
240:and closely following the
1750:
1664:
1633:
1537:
1496:
1460:
644:
633:
554:
256:mining and its use as an
115:
81:
71:
66:
56:
51:
39:
34:
1382:Tal-y-bont (near Bangor)
1052:Llanfihangel Bachellaeth
328:Holocene glacial retreat
450:River Mawddach panorama
252:in the past, including
27:River in Gwynedd, Wales
1656:Saint Tudwal's Islands
1057:Llanfihangel-y-Pennant
314:
111:
100:
555:Principal settlements
312:
106:
98:
1478:Coleg Meirion-Dwyfor
503:52.85452°N 3.75388°W
1800:Rivers of Snowdonia
499: /
645:Towns and villages
582:Blaenau Ffestiniog
508:52.85452; -3.75388
315:
112:
101:
1795:Rivers of Gwynedd
1782:
1781:
1701:Listed buildings
1504:Caernarfon Castle
1497:Castles and forts
1468:Bangor University
353:branch line from
250:industrialisation
93:
92:
16:(Redirected from
1807:
1772:
1771:
1770:
1760:
1759:
1758:
1727:Lord Lieutenants
1651:Ynys Gwylan-fawr
1519:Dolbadarn Castle
1514:Criccieth Castle
1267:Penrhyndeudraeth
1187:Mynydd Llandygai
639:
541:
534:
527:
518:
517:
514:
513:
511:
510:
509:
504:
500:
497:
496:
495:
492:
437:
434:
428:
427:
419:
389:
324:glaciated valley
238:Llyn Trawsfynydd
220:Black waterfalls
161:Llyn Trawsfynydd
142:
120:
119:
107:The Mawddach in
44:
32:
31:
21:
1815:
1814:
1810:
1809:
1808:
1806:
1805:
1804:
1785:
1784:
1783:
1778:
1768:
1766:
1756:
1754:
1746:
1660:
1629:
1565:Afon Cwmnantcol
1533:
1492:
1456:
1362:Sarn Meyllteyrn
1272:Pentre Gwynfryn
957:Llan Ffestiniog
640:
631:
550:
545:
507:
505:
501:
498:
493:
490:
488:
486:
485:
446:
441:
440:
435:
431:
420:
416:
411:
406:
405:
404:
395:
390:
347:
320:
288:
210:which joins at
198:Afon Cwm Mynach
138:
84:
47:
28:
23:
22:
15:
12:
11:
5:
1813:
1803:
1802:
1797:
1780:
1779:
1777:
1776:
1764:
1751:
1748:
1747:
1745:
1744:
1739:
1734:
1729:
1724:
1719:
1714:
1713:
1712:
1707:
1699:
1697:Country houses
1694:
1689:
1684:
1679:
1674:
1668:
1666:
1662:
1661:
1659:
1658:
1653:
1648:
1643:
1641:Bardsey Island
1637:
1635:
1631:
1630:
1628:
1627:
1622:
1617:
1615:Afon Rhythallt
1612:
1607:
1602:
1597:
1592:
1587:
1582:
1577:
1572:
1567:
1562:
1557:
1552:
1547:
1541:
1539:
1535:
1534:
1532:
1531:
1526:
1524:Harlech Castle
1521:
1516:
1511:
1509:Castell y Bere
1506:
1500:
1498:
1494:
1493:
1491:
1490:
1485:
1480:
1475:
1470:
1464:
1462:
1458:
1457:
1455:
1454:
1449:
1444:
1439:
1434:
1429:
1424:
1419:
1414:
1409:
1404:
1399:
1394:
1389:
1384:
1379:
1374:
1369:
1364:
1359:
1354:
1349:
1344:
1339:
1334:
1329:
1324:
1319:
1317:Rhos-y-gwaliau
1314:
1309:
1304:
1299:
1294:
1289:
1284:
1279:
1274:
1269:
1264:
1259:
1254:
1249:
1244:
1239:
1234:
1229:
1224:
1219:
1214:
1209:
1204:
1202:Nantlle Valley
1199:
1194:
1189:
1184:
1179:
1174:
1169:
1164:
1159:
1154:
1149:
1144:
1139:
1134:
1129:
1124:
1119:
1114:
1109:
1104:
1099:
1094:
1089:
1084:
1079:
1074:
1069:
1064:
1059:
1054:
1049:
1044:
1039:
1034:
1029:
1024:
1019:
1014:
1009:
1004:
999:
997:Llanddeiniolen
994:
989:
984:
979:
974:
969:
964:
959:
954:
949:
944:
939:
934:
932:Garndolbenmaen
929:
924:
919:
914:
909:
904:
899:
894:
889:
884:
879:
874:
869:
864:
859:
854:
849:
844:
839:
834:
829:
824:
819:
814:
809:
804:
799:
794:
789:
784:
779:
774:
769:
764:
759:
754:
749:
744:
739:
734:
729:
724:
719:
714:
709:
704:
699:
694:
689:
684:
682:Abergwyngregyn
679:
674:
669:
664:
659:
654:
648:
646:
642:
641:
634:
632:
630:
629:
624:
619:
614:
609:
604:
599:
594:
589:
584:
579:
574:
569:
564:
558:
556:
552:
551:
544:
543:
536:
529:
521:
483:
482:
477:
472:
467:
462:
460:Mawddach Trail
457:
452:
445:
444:External links
442:
439:
438:
429:
413:
412:
410:
407:
392:
391:
384:
383:
382:
363:Mawddach Trail
346:
343:
319:
316:
304:railway bridge
287:
284:
283:
282:
273:
267:
261:
231:
205:
127:River Mawddach
91:
90:
85:
82:
79:
78:
75:
69:
68:
64:
63:
58:
54:
53:
49:
48:
45:
37:
36:
26:
9:
6:
4:
3:
2:
1812:
1801:
1798:
1796:
1793:
1792:
1790:
1775:
1765:
1763:
1753:
1752:
1749:
1743:
1740:
1738:
1735:
1733:
1732:High Sheriffs
1730:
1728:
1725:
1723:
1720:
1718:
1715:
1711:
1708:
1706:
1703:
1702:
1700:
1698:
1695:
1693:
1690:
1688:
1685:
1683:
1680:
1678:
1675:
1673:
1670:
1669:
1667:
1663:
1657:
1654:
1652:
1649:
1647:
1644:
1642:
1639:
1638:
1636:
1632:
1626:
1625:Afon Tryweryn
1623:
1621:
1618:
1616:
1613:
1611:
1608:
1606:
1605:Afon Mawddach
1603:
1601:
1598:
1596:
1593:
1591:
1588:
1586:
1583:
1581:
1578:
1576:
1573:
1571:
1568:
1566:
1563:
1561:
1558:
1556:
1553:
1551:
1548:
1546:
1543:
1542:
1540:
1536:
1530:
1527:
1525:
1522:
1520:
1517:
1515:
1512:
1510:
1507:
1505:
1502:
1501:
1499:
1495:
1489:
1486:
1484:
1481:
1479:
1476:
1474:
1473:Coleg Harlech
1471:
1469:
1466:
1465:
1463:
1459:
1453:
1450:
1448:
1445:
1443:
1440:
1438:
1435:
1433:
1430:
1428:
1425:
1423:
1420:
1418:
1415:
1413:
1410:
1408:
1405:
1403:
1400:
1398:
1395:
1393:
1390:
1388:
1385:
1383:
1380:
1378:
1375:
1373:
1370:
1368:
1365:
1363:
1360:
1358:
1355:
1353:
1350:
1348:
1345:
1343:
1340:
1338:
1335:
1333:
1330:
1328:
1325:
1323:
1320:
1318:
1315:
1313:
1310:
1308:
1305:
1303:
1300:
1298:
1295:
1293:
1292:Porthdinllaen
1290:
1288:
1285:
1283:
1280:
1278:
1275:
1273:
1270:
1268:
1265:
1263:
1260:
1258:
1255:
1253:
1250:
1248:
1245:
1243:
1240:
1238:
1237:Penisa'r Waun
1235:
1233:
1230:
1228:
1225:
1223:
1220:
1218:
1215:
1213:
1210:
1208:
1205:
1203:
1200:
1198:
1195:
1193:
1190:
1188:
1185:
1183:
1180:
1178:
1175:
1173:
1170:
1168:
1165:
1163:
1160:
1158:
1155:
1153:
1150:
1148:
1145:
1143:
1140:
1138:
1135:
1133:
1130:
1128:
1125:
1123:
1120:
1118:
1115:
1113:
1110:
1108:
1105:
1103:
1100:
1098:
1095:
1093:
1090:
1088:
1085:
1083:
1080:
1078:
1075:
1073:
1070:
1068:
1065:
1063:
1060:
1058:
1055:
1053:
1050:
1048:
1045:
1043:
1040:
1038:
1035:
1033:
1030:
1028:
1025:
1023:
1020:
1018:
1015:
1013:
1010:
1008:
1005:
1003:
1000:
998:
995:
993:
990:
988:
985:
983:
980:
978:
975:
973:
970:
968:
967:Llanaelhaearn
965:
963:
960:
958:
955:
953:
950:
948:
945:
943:
940:
938:
935:
933:
930:
928:
925:
923:
920:
918:
915:
913:
910:
908:
905:
903:
900:
898:
895:
893:
890:
888:
885:
883:
880:
878:
875:
873:
872:Dinas Mawddwy
870:
868:
865:
863:
860:
858:
855:
853:
850:
848:
845:
843:
840:
838:
835:
833:
830:
828:
825:
823:
820:
818:
815:
813:
810:
808:
805:
803:
800:
798:
795:
793:
790:
788:
785:
783:
780:
778:
775:
773:
770:
768:
765:
763:
760:
758:
755:
753:
750:
748:
745:
743:
740:
738:
735:
733:
730:
728:
725:
723:
720:
718:
715:
713:
710:
708:
705:
703:
700:
698:
695:
693:
690:
688:
685:
683:
680:
678:
675:
673:
670:
668:
665:
663:
660:
658:
655:
653:
650:
649:
647:
643:
638:
628:
625:
623:
620:
618:
615:
613:
610:
608:
605:
603:
600:
598:
595:
593:
590:
588:
585:
583:
580:
578:
575:
573:
570:
568:
565:
563:
560:
559:
557:
553:
549:
542:
537:
535:
530:
528:
523:
522:
519:
515:
512:
481:
478:
476:
473:
471:
468:
466:
463:
461:
458:
456:
453:
451:
448:
447:
433:
425:
418:
414:
403:
399:
394:
388:
381:
379:
378:ship building
374:
372:
368:
364:
360:
356:
352:
345:Human history
342:
340:
335:
333:
329:
325:
311:
307:
305:
301:
297:
293:
281:
277:
274:
271:
268:
265:
262:
259:
255:
251:
247:
246:Coed-y-Brenin
243:
239:
235:
232:
229:
225:
221:
217:
213:
209:
206:
203:
199:
196:
195:
194:
191:
189:
185:
181:
177:
173:
169:
164:
162:
158:
154:
150:
146:
141:
136:
132:
128:
124:
118:
117:Afon Mawddach
110:
109:Coed-y-Brenin
105:
97:
89:
86:
80:
76:
74:
70:
65:
62:
59:
55:
50:
43:
38:
35:Afon Mawddach
33:
30:
19:
1646:Ynys Gifftan
1595:Afon Glaslyn
1585:Afon Dysynni
1192:Mynydd Nefyn
1177:Morfa Bychan
1137:Llanystumdwy
1132:Llanymawddwy
1122:Llanuwchllyn
1072:Llangelynnin
1037:Llanfaelrhys
1002:Llandegwning
887:Dolmelinllyn
867:Dinas Dinlle
837:Corris Uchaf
832:Clynnog Fawr
792:Bwlch-derwin
742:Betws Garmon
692:Aberllefenni
687:Abergynolwyn
484:
432:
426:. MacMillan.
423:
417:
402:Cadair Idris
375:
348:
336:
321:
289:
280:Aran Fawddwy
244:through the
219:
192:
175:
168:gold panning
165:
153:Aran Fawddwy
129:') is a
126:
116:
113:
29:
1620:Afon Seiont
1600:Afon Llyfni
1590:Afon Fathew
1580:Afon Dwyryd
1575:Afon Dwyfor
1483:Coleg Menai
1437:Y Felinheli
1402:Trawsfynydd
1397:Tanygrisiau
1357:Rhydyclafdy
1327:Rhoshirwaun
1312:Rhiwddolion
1297:Portmeirion
1252:Penmaenpool
1227:Pen-y-meinl
1182:Morfa Nefyn
1102:Llanllechid
1082:Llangwnnadl
1067:Llanfrothen
902:Efailnewydd
892:Dwygyfylchi
827:Clwt-y-bont
802:Capel Celyn
702:Abertrinant
506: /
398:Penmaenpool
208:Afon Gamlan
172:preparation
1789:Categories
1742:Public art
1610:Afon Ogwen
1570:Afon Daron
1560:Afon Cegin
1555:Afon Artro
1550:River Adda
1529:Fort Belan
1422:Tudweiliog
1372:Tal-y-llyn
1352:Rhyd-uchaf
1337:Rhostryfan
1332:Rhoslefair
1322:Rhosgadfan
1152:Llwyngwril
1147:Llwyndyrys
1107:Llanllyfni
1092:Llaniestyn
1042:Llanfaglan
1027:Llanelltyd
1007:Llandudwen
982:Llanbedrog
947:Glasinfryn
942:Gellilydan
937:Garneddwen
912:Fairbourne
882:Dolbenmaen
782:Brynrefail
762:Bontnewydd
722:Beddgelert
662:Aberdesach
652:Aberangell
617:Porthmadog
602:Ffestiniog
587:Caernarfon
491:52°51′16″N
409:References
330:to form a
276:Afon Wnion
1762:Geography
1710:Grade II*
1545:Afon Aber
1461:Education
1377:Talsarnau
1277:Penygroes
1232:Penffridd
1222:Pant Glas
1172:Minffordd
1167:Mellteyrn
1157:Maentwrog
1142:Llithfaen
1097:Llanigian
1032:Llanengan
1022:Llanegryn
1017:Llandygai
1012:Llandwrog
992:Llandanwg
987:Llanberis
972:Llanarmon
907:Eisingrug
857:Deiniolen
852:Cwm-y-glo
812:Carnguwch
777:Bryn-crug
772:Bryncroes
677:Abergeirw
657:Aberdaron
597:Dolgellau
592:Criccieth
494:3°45′14″W
292:Dolgellau
264:Afon Gain
234:Afon Eden
228:liverwort
202:Rhinogydd
149:Snowdonia
143:north of
125:for '
1677:Churches
1432:Waunfawr
1417:Tremadog
1412:Tregarth
1392:Talysarn
1342:Rhyd Ddu
1242:Penllech
1212:Nasareth
1127:Llanwnda
1087:Llangybi
1077:Llangian
1047:Llanfair
977:Llanbedr
962:Llanaber
952:Groeslon
927:Ganllwyd
922:Frongoch
877:Dinorwig
797:Caeathro
767:Botwnnog
747:Bodferin
737:Bethesda
727:Bethania
707:Afon Wen
697:Abersoch
672:Abererch
667:Aberdyfi
622:Pwllheli
577:Bethesda
572:Barmouth
371:Sustrans
359:Barmouth
339:Holocene
302:and its
300:Barmouth
270:Afon Wen
258:ordnance
212:Ganllwyd
140:SH820300
88:Barmouth
52:Location
18:Mawddach
1737:Museums
1722:History
1705:Grade I
1687:Schools
1634:Islands
1488:Schools
1302:Prenteg
1287:Pontrug
1282:Pistyll
1262:Penrhos
1247:Penllyn
1207:Nantmor
1197:Mynytho
1162:Mallwyd
1117:Llanrug
1112:Llannor
847:Croesor
822:Chwilog
757:Bontddu
607:Harlech
548:Gwynedd
318:Geology
286:Estuary
157:Harlech
145:Dduallt
135:Gwynedd
57:Country
1682:Places
1665:Topics
1538:Rivers
1452:Y Rhiw
1447:Y Fron
1442:Y Ffor
1407:Trefor
1307:Rachub
1257:Pennal
842:Corris
817:Ceidio
807:Carmel
752:Boduan
732:Bethel
717:Arthog
712:Anelog
567:Bangor
355:Ruabon
290:Below
260:range.
184:salmon
176:flashy
77:
1774:Wales
1692:SSSIs
1427:Tywyn
917:Friog
897:Edern
862:Dinas
627:Tywyn
612:Nefyn
332:fjord
296:Wnion
188:trout
131:river
123:Welsh
73:Mouth
61:Wales
1367:Soar
1347:Rhyd
1217:Nebo
787:Buan
562:Bala
400:and
254:gold
242:A470
226:and
224:moss
186:and
357:to
351:GWR
334:.
306:.
216:oak
147:in
133:in
1791::
180:pH
163:.
540:e
533:t
526:v
204:.
121:(
20:)
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
