Iolo's River Valleys
Iolo's River Valleys is a TV show on BBC2. Iolo Williams explores four of Wales’s most stunning river valleys from sea to source, uncovering their hidden wonders and remarkable wildlife. The program has been available since 2025. A total of 4 episodes have been broadcast, most recently in June 2025.
Last episode
Iolo's River Valleys
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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Iolo explores fascinating woodlands, searches for curlew chicks and uncovers the history of an ancient burial chamber nestled in the beautiful Conwy valley.
Iolo Williams explores the Dyfi Valley, from the Ynyslas dunes and the Cors Fochno bog to ospreys at Cors Dyfi and wild beavers near Machynlleth.
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.