Pontsarn Viaduct – Pontsticill Reservoir loop from Abercynon

Routes

Bike touring routes & trails

Pontsarn Viaduct – Pontsticill Reservoir loop from Abercynon

Hard

4.7

(3)

riders

Pontsarn Viaduct – Pontsticill Reservoir loop from Abercynon

03:59

61.6km

640m

Cycling

Hard bike ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels. The starting point of the route is accessible with public transport.

Last updated: August 21, 2026

Tips

Includes segments that go up or down a series of steps

You may need to carry your bike.

After 64 m for 44 m

After 61.6 km for 44 m

Waypoints

Start point

Train Station

Get Directions

24.5 km

Pontsarn Viaduct

Highlight • Historical Site

Good ride

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28.7 km

Taff Trail: Elevated View of Pontsticill Reservoir

Highlight (Segment) • Viewpoint

A superb off-road section which is a great alternative to the road. You can't see much of the reservoir from the road due to the trees on its bank. A …

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32.5 km

Pontsticill Reservoir

Highlight • Structure

Built in 1927, the Pontsticill Reservoir is a large reservoir in the Brecon Beacons National Park that can hold 3400 million gallons (14,460 million liters) of water. The beautiful reservoir …

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33.4 km

West Shore Road, Pontsticill Reservoir

Highlight (Segment) • Trail

If you're not equipped for the gravel track on the East shore of Pontsticill Reservoir, the road on the West shore offers a fun tarmac alternative. A nice long straight …

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35.7 km

Pontsticill Reservoir Dam and Tower

Highlight • Structure

This reservoir is located in the breathtaking Brecon Beacons of Wales. It is part of a series of reservoirs within the Taff Fechan Valley and was constructed between 1923 and …

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37.4 km

Merthyr Tydfil Cycle Path

Highlight (Segment) • Trail

A beautiful cycle path between Merthyr and Pontsticill Reservoir. The very start of the track at the Merthyr end is narrow and steep (you need to watch out for pedestrians), …

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57.3 km