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Mountain biking trails

Pentwyn Reservoir – Talybont Reservoir loop from Merthyr Tydfil

Mountain biking trails

Pentwyn Reservoir – Talybont Reservoir loop from Merthyr Tydfil

Moderate

4.6

(7)

54

riders

Pentwyn Reservoir – Talybont Reservoir loop from Merthyr Tydfil

04:05

53.9km

840m

Mountain biking

Moderate mountain bike ride. Good fitness required. Suitable for all skill levels. The starting point of the route is accessible with public transport.

Last updated: May 28, 2026

Tips

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

You may need to carry your bike.

After 110 m for 17 m

Waypoints

A

Start point

Train Station

Get Directions

6.29 km

Pontsarn Viaduct

Viewpoint

2

7.66 km

Taf Trail

Highlight • Cycleway

The full route provides a fantastic mix of terrain and scenery😊

Tip by

3

12.7 km

Wooden Bridge in Bannau Brycheiniog Forest

Highlight • Bridge

Around a 6 mile circular peaceful easy for all accessibilities. The forest is so special gives a magical effect of walking through absolutely beautiful.

Tip by

4

14.4 km

Pentwyn Reservoir

Highlight • Lake

Pentwyn Reservoir is the smaller sister to Pontsticill Reservoir, both being separated by a causeway going towards the old Dolygaer outdoor centre. It is a very popular spot with fishermen …

Tip by

5

15.0 km

Pontsticill Reservoir at Dol-y-gaer

Highlight • Viewpoint

Nice little descent down to the side of the Pontscill Reservoir.

Tip by

16.0 km

Pontsticill Reservoir

Lake

29.2 km

Talybont Reservoir Nature Reserve

Nature Reserve

8

31.3 km

Talybont Reservoir

Highlight • Structure

The largest reservoir in the Brecons, Talybont reservoir was completed in 1939. It supplies water to Newport, further south.

Seventeen dwellings (including farms) were co-opted during its construction.

Despite its …

Tip by

9

32.9 km

View of the Talybont-on-Usk Reservoir

Highlight (Segment) • Lake

10

41.3 km

Taf Fechan Forest

Highlight • Forest

gradual Hill climb leading onto a 7% gradient. I have also taken photos of the local map.

Tip by

42.4 km

Taf Fechan Forest

Forest

43.0 km

Pentwyn Reservoir

Lake

13

48.0 km

Taf Fechan River Bridge

Highlight • River

To access this area is a very steep incline and decline into this valley section 7- 9% gradient in either direction.

Tip by

52.3 km

Morlais Brook

Forest

B

53.9 km

End point

Train Station

Way Types & Surfaces

Way Types

20.5 km

19.6 km

9.13 km

2.81 km

1.45 km

245 m

144 m

Surfaces

26.4 km

15.8 km

8.87 km

2.29 km

553 m

< 100 m

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Elevation

Elevation

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

Highest point (440 m)

Lowest point (170 m)

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Weather

Powered by Foreca

Monday 13 July

26°C

12°C

0 %

Additional weather tips

Max wind speed: 20.0 km/h

to get more detailed weather forecasts along your route

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