Llwyn-on Reservoir Dam – Garwnant Visitor Centre loop from Forest Visitor Centre

Mountain biking trails

Llwyn-on Reservoir Dam – Garwnant Visitor Centre loop from Forest Visitor Centre

Moderate

4.5

(4)

riders

Llwyn-on Reservoir Dam – Garwnant Visitor Centre loop from Forest Visitor Centre

02:37

33.8km

550m

Mountain biking

Moderate mountain bike ride. Good fitness required. The starting point of the route is accessible with public transport.

Last updated: October 14, 2026

Tips

Includes a segment in which cycling is not permitted

After 736 m for 136 m

Waypoints

Start point

Bus stop

Get Directions

804 m

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

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5.33 km

Llwyn Onn Reservoir

Highlight • Structure

Smaller reservoir than others in the area, but with stunning landscape great off road paths to keep you away from the A470

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5.50 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 …

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7.67 km

Gravel Path in Bannau Brycheiniog National Park

Highlight • Trail

18.0 km

Brilliant strip of traffic-free cycleway that links Aberdare near the train station to Hirwaun. It's pretty much flat, although you'll need to look out for debris like leaves and sticks in the winter months.

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21.5 km

View of Ruins and Woodland in Bannau Brycheiniog National Park

Highlight (Segment) • Historical Site

Would be a good thing to have sturdy walking boots as it's quite loose under foot.

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29.0 km

Cwm Cadlan Nature Reserve

Highlight • Viewpoint

The small road runs from Penderyn in the west over the hill and down to Llwyn-onn Reservoir in the east. It's a nice ride avoiding the busier A4059 to the north.

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