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Tal-y-Llyn or Llyn Mwyngil & Cregennan Lakes loop from Dolgellau — Eryri / Snowdonia National Park

Routes

Bike touring routes & trails

Tal-y-Llyn or Llyn Mwyngil & Cregennan Lakes loop from Dolgellau — Eryri / Snowdonia National Park

Hard

5.0

(2)

riders

Tal-y-Llyn or Llyn Mwyngil & Cregennan Lakes loop from Dolgellau — Eryri / Snowdonia National Park

03:36

48.2km

880m

Cycling

This difficult touring bicycle loop from Dolgellau takes you on a demanding 29.9 miles (48.2 km) ride through Eryri / Snowdonia National Park. You will gain 2872 feet (875 metres) in elevation, typically completing the route in about 3 hours and 36 minutes. Expect spectacular views of the Cregennan Lakes,…

Last updated: April 23, 2026

Waypoints

Start point

Parking

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29.0 km

View of Cregennan Lakes and Cadair Idris

Highlight • Viewpoint

The key point to know about this NCR is that as you complete the climb the road falls apart and it goes from gravel to rocks near the top. Several …

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34.7 km

View of Barmouth and the Mawddach Estuary

Highlight • Trail

The path may be tough going but the views from here over to Barmouth and the Mawddach estuary are simply beautiful whichever way you are going.

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35.9 km

NCN 82 Gravel Trail on Cadair Idris Flank

Highlight (Segment) • Trail

This is a hilly section of the NCN 82 and the ascent over the flank of Cadair Idris is not only tough but rough too. It is a gravelly pretty …

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38.7 km

Cregennan Lakes

Highlight • Lake

These twin lakes are particularly beautiful and lie just north of Cadair Idris. Both are owned by the National Trust and are free to visit. With mountains rising around them …

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44.9 km

Lake Gwernan

Highlight • Viewpoint

Sitting under the great hulk of Cadair Idris, Lake Gwernan is an eye-catching feature on Route 82 out of Dolgellau. The lake is 12 acres (5 ha) with gorgeous woodlands …

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48.2 km

End point

Parking

Way Types & Surfaces

Way Types

33.2 km

7.04 km

4.43 km

3.04 km

436 m

< 100 m

Surfaces

24.1 km

16.8 km

6.87 km

474 m

Elevation

Nothing selected – click and drag below to see the stats for a specific part of the route.

Highest point (410 m)

Lowest point (0 m)

Weather

Thursday 21 May

21°C

11°C

0 %

Additional weather tips

Max wind speed: 16.0 km/h

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This route was planned by komoot.

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Tal-y-Llyn or Llyn Mwyngil & Cregennan Lakes loop from Dolgellau — Eryri / Snowdonia National Park

03:36h

48.2km

880m

Hard

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Tal-y-Llyn or Llyn Mwyngil & Cregennan Lakes loop from Dolgellau — Eryri / Snowdonia National Park

View of Cregennan Lakes and Cadair Idris

View of Barmouth and the Mawddach Estuary

NCN 82 Gravel Trail on Cadair Idris Flank

Cregennan Lakes

Lake Gwernan

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