longer than Nant Peris

(2.8km) Nantygywryd, A4086 to Garth Farm Bridge 5km of grade 4 (5)
(3.2km) Arddu, Halfway House to Llanberis 3km of grade 4/5
(4km) Nantmor, Gelli-lago bridge to Bwlchgwernog Bridge 6km of grade 4
(4.4km) Ogwen, Ogwen Bank to Scout Hut Bridge 4km of grade 4 (5)
(4.9km) Llugwy, Helyg to Brown's Falls 4km of grade 4
(5.1km) Caseg, Afon Wen confluence to upper Gerlan bridge 3km of grade 4 (5)
(5.5km) Colwyn, Hafod Ruffydd Isaf to Beddgelert 4km of grade 4 (5); 0.08 (empty) 1 hour ago
(6.2km) Lledr, Blaenau Dolwyddelan to Pont y Pant 9km of grade 4/5
(6.5km) Ogwen, Halfway Bridge to green footbridge 3km of grade 4
(8.3km) Goedal, Wooden bridge to Teigl confluence 3km of grade 5 (6)
(8.9km) Anafon, Llyn Anafon to forest area 2.5km of grade 4/5
(10.5km) Crafnant, Cae Crwn to Trefriw 2.5km of grade 4/5
(10.5km) Lledr, Pont y Pant to Beaver Pool 6km of grade 4 (5); 0.37 (empty) 1 hour ago
(15.2km) Cwm Nantcol, Pont Cerrig to Artro confluence 5km of grade 5
(15.6km) Gain, Cattle grid to Pistyll y Cain 8km of grade 4/5 (5+); 0.29 (empty) 1 hour ago
(16.9km) Ysgethin, Craig y Dinas to Talybont 4km of grade 4/5
(18.1km) Mawddach, Pont Abergeirw to PTF 9km of grade 5; 0.29 (empty) 1 hour ago
(18.5km) Cwm Mynach, Garth Gell bridge to Pen y Bryn 2.5km of grade 5
(18.6km) Wen, Capel Hermon to Copper Mine carpark 4km of grade 4
(20.5km) Lliw, Lliw Falls to Bryn Gwyn 5km of grade 4/5
(21.5km) Gwynant, Cader car park to Abergwynant main road bridge 4km of grade 4/5
(22.4km) Clywedog (Torrent), Brithdir to Wnion 2.5km of grade 5 (6)
(23.4km) Wnion, Dolddeuli Bridge to Bontnewydd 6km of grade 4 (5); 1.7 (scrape) 1 hour ago
(26.4km) Dulas (Corris), Llwydiarth Hall bridge to Esgairgeiliog 7km of grade 4
(26.8km) Twrch (Bala), Talardd to Llanuwchllyn 4.5km of grade 4/5
(29.5km) Hilnant, Tyn y Cwm to Garth Goch 4km of grade 4 (5)
(30km) Eunant Fawr, Y Gadfa to Pont Eunant 3km of grade 5
(39.4km) Rheidol, Ponterwyd to Allt-y-Gigfran 6km of grade 5
(40.4km) Rhaeadr, Gorwallt bridge to Llanrhaeadr 3km of grade 4
(42.1km) Rhuddnant, Gorge 3km of grade 4/5 (6)
(43.7km) Ystwyth, Cwmystwyth to Pont-rhyd-y-groes 5km of grade 5; 0.28 (empty) 2 hours ago
(43.8km) Ystwyth, Afon Diliw to Cwmystwyth 9km of grade 4/5; 0.28 (empty) 2 hours ago
(47.4km) Arth, Pennant to Aberarth 5km of grade 4
(47.9km) Dulas (Llanidloes), Tylwch to A470 4km of grade 4/5
(52.2km) Doethie, Blaendoithie to Junction Pool 10km of grade 4 (6)
(53.5km) Pysgotwr, Forestry bridge to Angel Inn 7km of grade 5
(54.2km) Irfon, Camddur Bleiddiad gorge to Llanwrtyd Wells 13km of grade 4 (5); 0.45 (empty) 2 hours ago
(56.1km) Tywi, Llyn Brianne to Junction Pool 3km of grade 4/5; 0.11 (empty) 2 hours ago
(70.7km) Tawe, Upper Tawe Gorge 6km of grade 5; 0.46 (empty) 2 hours ago
(71.8km) Twrch (Tawe), Dorwen to Ystradowen 5km of grade 4/5 (6)
(71.9km) Nant Tywynni, Tower to confluence 3km of grade 4
(72.5km) Tawe, Glyntawe to Abercraf 7km of grade 4/5; 0.46 (scrape) 2 hours ago
(72.6km) Aman, Gwaun-Cae-Gurwen To Aman Confluence 4km of grade 5
(73.4km) Giedd, Dorwen ar Giedd to Tawe confluence 5km of grade 4/5
(73.6km) Nant y Gwair, Rhos Dringarth to Ystradfellte Reservoir 4km of grade 4