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Pontsticill Reservoir – Pontsticill Reservoir loop from Merthyr Tydfil

Pontsticill Reservoir – Pontsticill Reservoir loop from Merthyr Tydfil

Moderate

1.0

(1)

riders

Pontsticill Reservoir – Pontsticill Reservoir loop from Merthyr Tydfil

01:42

36.2km

400m

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 9, 2026

Tips

Includes a segment that goes up or down a series of steps

You may need to carry your bike.

After 36.1 km for 17 m

Waypoints

Start point

Train Station

Get Directions

3.57 km

Cefn-coed Viaduct

Highlight • Monument

The Cefn-coed Viaduct is the third-largest viaduct in Wales. This huge, curved structure once carried the Brecon and Merthyr Tydfil Junction Railway and is now part of the Taff Trail, which is Route 8 of the National Cycle Network that runs between Cardiff and Brecon. It offers walkers and cyclists a superb view of the Taf Fawr as it cascades over the many weirs in the valley

Tip by

6.29 km

Pontsarn Viaduct

Highlight • Historical Site

Good ride

Tip by

10.1 km

Pontsticill Reservoir

Highlight • Structure

Pontsticill Reservoir is a great location for its scenic beauty and because it is the start of many hiking and biking trails. There is a nice trail that actually goes around the entire reservoir, but it does involve road walking too. When you do visit this location, beware of thefts from unattended vehicles and take valuables with you.

Tip by

11.7 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 to crank out some speed, or if it's the views you're after a nice viewpoint from the lay-by.

Tip by

12.6 km

View of the Lake in Bannau Brycheiniog National Park

Highlight • Lake

14.5 km

Pentwyn Reservoir

Lake

15.1 km

Taf Fechan Forest

Forest

16.8 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 is popular with sailors, anglers, picnickers, as well as walkers and cyclists. The Taff Trail runs on the western side of the reservoir.

Tip by

18.2 km

Pontsticill Lake Canoe Launch

Highlight • Rest Area

This jetty on Pintsticill’s west side is used as a launching point for kayakers and canoers.

Tip by

30.5 km

Pontsarn Viaduct

Highlight • Monument

Pontsarn Viaduct was built in the 1860s to carry the Brecon and Merthyr Railway over the Taf Fechan river. The viaduct has seven arches and is situated in a very picturesque landscape.

Tip by

36.2 km

End point

Train Station

Way Types & Surfaces

Way Types

20.0 km

12.6 km

2.54 km

641 m

244 m

126 m

< 100 m

Surfaces

34.7 km

1.24 km

257 m

< 100 m

Elevation

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

Highest point (360 m)

Lowest point (170 m)

Weather

Tuesday 1 September

18°C

13°C

38 %

Additional weather tips

Max wind speed: 21.0 km/h

to get more detailed weather forecasts along your route

Comments

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Pontsticill Reservoir – Pontsticill Reservoir loop from Merthyr Tydfil

Cefn-coed Viaduct

Pontsarn Viaduct

Pontsticill Reservoir

West Shore Road, Pontsticill Reservoir

View of the Lake in Bannau Brycheiniog National Park

Pontsticill Reservoir

Pontsticill Lake Canoe Launch

Pontsarn Viaduct

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