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Documentary

Iolo's River Valleys

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First Aired:May 6, 2025
Seasons:2 seasons
Episodes:5
Status:Returning Series

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

Cast

Iolo Williams

Iolo Williams

Self - Presenter

Seasons

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

The Rheidol Valley

E1The Rheidol Valley

29m

May 6, 2025

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.

The Dyfi Valley

E2The Dyfi Valley

29m

May 13, 2025

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

The Conwy Valley

E3The Conwy Valley

29m

May 20, 2025

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

The Vale of Clwyd

E4The Vale of Clwyd

29m

May 27, 2025

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.

Iolo Williams explores four of Wales's longest river valleys from sea to source.

Usk

E1Usk

29m

May 6, 2026

Iolo Williams explores the Usk valley, from Newport’s urban wildlife to ground-nesting birds, a huge lesser horseshoe bat roost and scarce firecrests.

Tywi

E2Tywi

29m

May 13, 2026

Iolo Williams explores the Tywi river valley, from Llansteffan’s coastal dunes to fallow deer ruts, ancient oak woodlands, and the remote heights of the Tywi Forest.

Teifi

E3Teifi

29m

May 20, 2026

Iolo explores the Teifi river valley, and finds a slow worm hunting, meets a coracle fisherman, is thrilled by a fishing Otter, and watches a pair of kestrels at their nest.

Dee

E4Dee

29m

May 27, 2026

Iolo explores the stunning Dee valley, from wintering birds along the estuary, to displaying black grouse on moorland, rare freshwater-pearl mussels, and spawning sea trout.

Storyline

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

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Iolo's River Valleys — FlixWorld