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Trefil Quarry Cliffs – Pontsticill Reservoir loop from Tredegar

Trefil Quarry Cliffs – Pontsticill Reservoir loop from Tredegar

Hard

7

riders

Trefil Quarry Cliffs – Pontsticill Reservoir loop from Tredegar

02:42

40.1km

570m

Gravel riding

Hard gravel 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: June 21, 2026

Tips

Cycling is not permitted along parts of this route

After 33.8 km for 186 m

After 36.2 km for 89 m

Waypoints

A

Start point

Bus stop

Get Directions

1

9.86 km

Trefil Quarry Cliffs

Highlight • Gorge

My favourite way into the Brecon Beacons, this gravel road from Brynmawr takes you pass these staggering cliffs of rock before descending down to Pontsticill Reservoir and riding the Gap.

Tip by

2

10.2 km

The Flinty Stone

Highlight • Natural Monument

3

13.0 km

View of Bryn Oer Tramroad

Highlight • Viewpoint

If climbing this is the end of the steep section, if descending this is the start of a blue/red rocky descent. Insane views from high up

MTB or brave graveller only

Tip by

18.7 km

Pontsticill Reservoir

Lake

5

19.7 km

Pontsticill Reservoir at Dol-y-gaer

Highlight • Viewpoint

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

Tip by

6

20.3 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

7

20.7 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 …

Tip by

22.1 km

Viewpoint

Viewpoint

9

26.1 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

10

33.1 km

Simnai Dirdro (Twisted Chimney)

Highlight • Structure

‘Simnai Dirdro’ (twisted chimney) by Brian Tolle. Made of polycarbonate.

Tip by

B

40.1 km

End point

Bus stop

Way Types & Surfaces

Way Types

15.9 km

10.8 km

6.79 km

3.35 km

3.00 km

334 m

Surfaces

14.1 km

13.9 km

10.2 km

1.63 km

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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 (510 m)

Lowest point (300 m)

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Weather

Powered by Foreca

Thursday 9 July

32°C

16°C

0 %

Additional weather tips

Max wind speed: 7.0 km/h

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