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Trefil Quarry Cliffs – Pontsticill Reservoir loop from Tredegar

Trefil Quarry Cliffs – Pontsticill Reservoir loop from Tredegar

Hard

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

Start point

Bus stop

Get Directions

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

10.2 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

19.7 km

Pontsticill Reservoir at Dol-y-gaer

Highlight • Viewpoint

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

Tip by

20.3 km

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 and outdoor enthusiasts alike. The reservoir is used daily for a mix of watersports such as paddle boarding, kayaking, canoeing and raft building. It is in a beautiful setting, and you have great views north towards Pen y Fan and nice walks nearby.

Tip by

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 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

22.1 km

Viewpoint

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.

The Taf Fechan LNR comprises about 2.5 km of river with steep valley sides of Carboniferous limestone. The river has eroded the limestone into a narrow gorge in the centre of the site. A mosaic of deciduous woodland on the slopes with a canopy of Beech, Birch and Ash, gives way to Alder and Grey Willow closer to the river.

Tip by

33.1 km

Simnai Dirdro (Twisted Chimney)

Highlight • Structure

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

Tip by

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

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)

Weather

Saturday 4 July

24°C

13°C

0 %

Additional weather tips

Max wind speed: 15.0 km/h

to get more detailed weather forecasts along your route

Comments

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Trefil Quarry Cliffs – Pontsticill Reservoir loop from Tredegar

Trefil Quarry Cliffs

The Flinty Stone

View of Bryn Oer Tramroad

Pontsticill Reservoir at Dol-y-gaer

Pentwyn Reservoir

Pontsticill Reservoir

Taf Fechan River Bridge

Simnai Dirdro (Twisted Chimney)

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