TV Series20252 Seasons8 EpisodesReturning Series
Iolo's River Valleys
Documentary
Iolo Williams explores four of Wales’s most stunning river valleys from sea to source, uncovering their hidden wonders and remarkable wildlife.
Episodes & Seasons
Browse episodes by season for this series.
Series 1
4 EpisodesIolo Williams explores four of Wales’s most stunning river valleys.
EP 01
01.The Rheidol Valley
29m
2025-05-06
01.The Rheidol Valley
29m
Aired 2025-05-06
Iolo Williams explores the Rheidol valley and looks for elusive pine martens. He’s also treated to views of red kites nesting in a village and explores a remote zinc mine.
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EP 02
02.The Dyfi Valley
29m
2025-05-13
02.The Dyfi Valley
29m
Aired 2025-05-13
Iolo Williams explores the Dyfi Valley, from Ynyslas dunes and Cors Fochno bog to Ospreys at Cors Dyfi and wild Beavers near Machynlleth.
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EP 03
03.The Conwy Valley
29m
2025-05-20
03.The Conwy Valley
29m
Aired 2025-05-20
Iolo explores fascinating woodlands, searches for Curlew chicks and uncovers the history of an ancient burial chamber nestled in the beautiful Conwy Valley.
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EP 04
04.The Vale of Clwyd
29m
2025-05-27
04.The Vale of Clwyd
29m
Aired 2025-05-27
Iolo Williams explores the Vale of Clwyd, from coastal lizards and rare butterflies to a tame raven and elusive red squirrels, uncovering the valley's hidden wonders and wildlife.
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Series Cast
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