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Road cycling routes

Carmarthenshire

Cwm Lliedi Reservoir – Swiss Valley Trail loop from Tumble

Road cycling routes

Carmarthenshire

Cwm Lliedi Reservoir – Swiss Valley Trail loop from Tumble

Moderate

6

riders

Cwm Lliedi Reservoir – Swiss Valley Trail loop from Tumble

01:42

26.4km

320m

Road cycling

Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride. The starting point of the route is accessible with public transport.

Last updated: August 13, 2026

Waypoints

A

Start point

Bus stop

1

12.1 km

Cwm Lliedi Reservoir

Highlight • Lake

This beautiful reservoir is framed by the stunning mountain scenery of the Brecon Beacons. From the vantage point of the Swidd Valley Trail, you can enjoy a great view of the reservoir and its picturesque surroundings.

Tip by

2

12.1 km

Swiss Valley Reservoir (Lower Lliedi Reservoir)

Highlight • Cycleway

Great place to canoe or SUP. Organised tours can be arranged or you can self-launch, with permission.

Tip by

3

12.4 km

Swiss Valley Trail

Highlight • Cycleway

You get a temperature drop as your ride through this cutting in the rocks. Great on a warm day but can be chilly at other times.

Tip by

4

13.4 km

Swiss Valley Reservoir

Highlight • Structure

5

15.0 km

Disused Kiln and Chimney

Highlight • Historical Site

disused kiln, hidden in wood to side of trail very overgrown but worth a look,

Tip by

B

26.4 km

End point

Bus stop

Way Types & Surfaces

Way Types

11.2 km

10.5 km

3.09 km

1.61 km

< 100 m

Surfaces

12.8 km

12.3 km

1.21 km

< 100 m

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Elevation

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

Highest point (210 m)

Lowest point (30 m)

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Weather

Powered by Foreca

Sunday 11 October

18°C

13°C

18 %

Additional weather tips

Max wind speed: 21.0 km/h

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