
Iolo's River Valleys
2025•29m
Documentary
Iolo Williams explores four of Wales’s most stunning river valleys from sea to source, uncovering their hidden wonders and remarkable wildlife.
Language
EN
Status
Returning Series
First Aired
May 6, 2025
Last Aired
May 27, 2025
Networks
BBC One Wales
Where to Watch
Region US · Lang EN
US
No providers available for this region.
Seasons & Episodes
Select a season to view episodes. Reddit links may contain spoilers.
Season

E1
The Rheidol Valley
Air date: 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.

E2
The Dyfi Valley
Air date: 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.

E3
The Conwy Valley
Air date: 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.

E4
The Vale of Clwyd
Air date: 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.










