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Running trails & routes

Carmarthenshire

Cwm Lliedi (Lower) Reservoir – Swiss Valley Trail loop from Dafen

Running trails & routes

Carmarthenshire

Cwm Lliedi (Lower) Reservoir – Swiss Valley Trail loop from Dafen

Moderate

9

runners

Cwm Lliedi (Lower) Reservoir – Swiss Valley Trail loop from Dafen

01:21

12.5km

120m

Running

Moderate run. Good fitness required. Mostly paved surfaces. Suitable for all skill levels. The starting point of the route is right next to a parking lot.

Last updated: July 17, 2026

Waypoints

A

Start point

Parking

1

3.23 km

Cwm Lliedi (Lower) Reservoir

Highlight • Structure

Enjoy the walk that winds along the edge of Cwm Lliedi (Lower) Reservoir and through the woodlands of Swiss Valley offering views over the water and the chance to spot a variety of wildlife.

Tip by

2

5.09 km

Swiss Valley Reservoir

Highlight • Structure

3

5.65 km

Steve

Highlight • Other

4

6.68 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

5

9.31 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

6

9.53 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

7

9.60 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

B

12.5 km

End point

Parking

Way Types & Surfaces

Way Types

6.40 km

3.12 km

2.50 km

232 m

179 m

115 m

Surfaces

5.07 km

3.76 km

1.56 km

1.45 km

413 m

304 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 (110 m)

Lowest point (20 m)

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Weather

Powered by Foreca

Sunday 11 October

18°C

14°C

86 %

Additional weather tips

Max wind speed: 19.0 km/h

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