Watch
  • BBC Two
  • BBC One Wales

Iolo's River Valleys

  • 2025
  • Returning Series
  • Documentary
  • ~29m / ep
  • 2 seasons

Iolo Williams explores four of Wales’s most stunning river valleys from sea to source, uncovering their hidden wonders and remarkable wildlife.

Latest: Series 1 · 2025

View all seasons

Iolo Williams explores four of Wales’s most stunning river valleys.

  1. E1. The Rheidol Valley

    May 6, 2025 · 29m

    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.

  2. E2. The Dyfi Valley

    May 13, 2025 · 29m

    Iolo Williams explores the Dyfi Valley, from Ynyslas dunes and Cors Fochno bog to Ospreys at Cors Dyfi and wild Beavers near Machynlleth.

  3. E3. The Conwy Valley

    May 20, 2025 · 29m

    Iolo explores fascinating woodlands, searches for Curlew chicks and uncovers the history of an ancient burial chamber nestled in the beautiful Conwy Valley.

  4. E4. The Vale of Clwyd

    May 27, 2025 · 29m

    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.