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Beacons Reservoir – Llwyn-on Reservoir Dam loop from Llwyn-onn

Beacons Reservoir – Llwyn-on Reservoir Dam loop from Llwyn-onn

Moderate

riders

Beacons Reservoir – Llwyn-on Reservoir Dam loop from Llwyn-onn

02:30

48.4km

770m

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

Tips

Cycling is not permitted along parts of this route

After 2.33 km for 136 m

After 11.0 km for 116 m

Waypoints

Start point

Bus stop

Get Directions

2.40 km

View of Llwyn-on Reservoir from the west bank

Highlight • Lake

Look out for the opening in the hedge row, some gentle steps (3-4) and then a short trail to the water. Can easily walk your bike down, kick back and have some drink and recharge

Tip by

8.83 km

Beacons Reservoir

Highlight • Structure

The northernmost and highest of the three reservoirs in the Taff Fawr valley.

Tip by

11.1 km

Devil's Elbow Climb from Heol Senni

Highlight (Segment) • Viewpoint

The Devil’s Elbow epitomises the harsh beauty of hidden Wales. With its crumbling surface and neglected rusting barriers it weaves through beautifully rugged scenery presenting one of the toughest challenges …

Tip by

27.8 km

Devil's Elbow, Ystradfellte

Highlight • Climb

28.3 km

Maen Llia Standing Stone

Highlight • Monument

According to legend, the stone goes down to the river, the Afon Llia to drink on occasion. This tall tale seems likely to be an allusion to the fact that …

Tip by

40.3 km

Cwm Cadlan Nature Reserve

Highlight (Segment) • Trail

A climb and descent in any direction this takes you over the Cadlan Nature Reserve. Marshy grassland doesn't appear by accident, there's often cloud/drizzle in the air!

Tip by

48.0 km

Llwyn-on Reservoir Dam

Highlight • Structure

Llwyn-on reservoir, built in 1926, covers 150 acres and is the largest of the three in the Taff Fawr Valleys area. Walking along the shore you can be immersed in …

Tip by

48.4 km

End point

Bus stop

Way Types & Surfaces

Way Types

28.9 km

18.8 km

404 m

347 m

Surfaces

43.9 km

4.02 km

424 m

157 m

Elevation

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

Highest point (440 m)

Lowest point (240 m)

Weather

Friday 4 September

17°C

9°C

0 %

Additional weather tips

Max wind speed: 7.0 km/h

to get more detailed weather forecasts along your route

Comments

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Our route recommendations are based on thousands of hikes, rides, and runs completed by other people on komoot.

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Beacons Reservoir – Llwyn-on Reservoir Dam loop from Llwyn-onn

View of Llwyn-on Reservoir from the west bank

Beacons Reservoir

Stream in the Brecon Beacons

Devil's Elbow Climb from Heol Senni

Devil's Elbow, Ystradfellte

Maen Llia Standing Stone

Cwm Cadlan Nature Reserve

Llwyn-on Reservoir Dam

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