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Routes
Mountain biking trails
United Kingdom
Wales
South Wales
Talybont-On-Usk

Pentwyn Reservoir and Talybont Reservoir loop

Moderate

4.1

(14)

99

riders

Pentwyn Reservoir and Talybont Reservoir loop

02:34

27.7km

520m

Mountain biking

Embark on the Pentwyn Reservoir and Talybont Reservoir loop, a moderate mountain biking route that takes you through the scenic Bannau Brycheiniog National Park. You will cover 17.2 miles (27.7 km) with a total elevation gain of 1691 feet (515 metres), which should take about 2 hours and 33 minutes…

Last updated: April 23, 2026

Waypoints

A

Start point

Parking

Get Directions

1

1.57 km

Cwm Callan Roman Road Trail

Highlight (Segment) • Viewpoint

An old Roman Road which lends itself magnificently to fun on two wheels. Wide open, with fabulous views, before darting into woodland as it reaches the reservoir.

Tip by

2

5.04 km

This trail is constantly climbing towards The Gap, generally wide and hard packed in the dry with sections of rocks & stones.

There are many places to stop and enjoy the stunning views both in front and behind you.

Tip by

3

5.19 km

View of Talybont Reservoir

Highlight • Viewpoint

Great views of Talybont reservoir.

Translated by Google •

Tip by

4

17.2 km

This great bit of single track is a great alternative to the Taff Trail on the descent to Tal y bont.

Tip by

5

20.1 km

Torpantau Railway Tunnel

Highlight • Structure

Torpantau Tunnel is a closed-down, 666-yard-long abandoned masonry railway tunnel in Wales that was opened in 1863 and closed down in 1963. It was part of the Brecon and Merthyr …

Tip by

B

27.7 km

End point

Parking

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Way Types & Surfaces

Way Types

19.1 km

2.95 km

2.80 km

1.98 km

845 m

Surfaces

14.4 km

5.84 km

2.74 km

2.19 km

1.30 km

1.18 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 (210 m)

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Weather

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Saturday 9 May

12°C

3°C

-- %

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This route was planned by komoot.

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Frequently Asked Questions

What is the terrain like on the Pentwyn Reservoir and Talybont Reservoir loop?

This mountain bike loop offers a diverse range of terrain. You'll encounter extensive trail networks through Talybont Forest, sections alongside the reservoirs, and parts of the Taff Trail. Expect a mix of gentle forest roads, challenging hilly sections, and technical paths. Some areas feature wide, hard-packed trails, while others include rocks, stones, and potentially slippery sunken roads. There's also a fun rocky path to navigate.

How long should I expect to spend mountain biking this loop?

The Pentwyn Reservoir and Talybont Reservoir loop is approximately 27.7 km (17.2 miles) long with about 515 meters of ascent. Komoot estimates it typically takes around 2 hours and 34 minutes to complete. However, your actual time may vary depending on your fitness level, riding speed, and how often you stop to enjoy the views.

Are there any challenging sections on this mountain bike loop?

While categorized as 'moderate', some sections of the loop may require a good level of fitness and even advanced riding skills. Descents can vary from fast fire roads to more technical, rocky, and potentially slippery sunken roads. Riders should be prepared for varied conditions and some demanding parts.

What can I see along the Pentwyn Reservoir and Talybont Reservoir loop?

The loop offers impressive scenery throughout, including expansive views of both the Talybont and Pentwyn reservoirs. Notable highlights along the route include the Cwm Callan Roman Road Trail, the Route to The Gap (Bannau Brycheiniog National Park), and a specific View of Talybont Reservoir. You'll also pass through a Singletrack Trail in Bannau Brycheiniog National Park and the historic Torpantau Railway Tunnel.

Where can I park to access this mountain bike loop?

While specific parking locations aren't detailed in the tour data, the Talybont-on-Usk area is a common base for accessing trails around the reservoirs. You'll find various amenities there, including pubs and cafes, which often have parking options or are good starting points for rides in the network.

Is this mountain bike loop dog-friendly?

Generally, dogs are allowed on trails within Bannau Brycheiniog National Park. However, it's crucial to keep them under close control, especially near livestock, and on a lead in certain areas or during specific times of the year (e.g., lambing season). Always follow the Countryside Code and any local signage.

What is the best time of year to mountain bike this loop?

The Brecon Beacons National Park offers beautiful riding conditions throughout much of the year. Spring and autumn often provide pleasant temperatures and vibrant scenery. Summer is also popular, but trails can be busier. Be mindful that weather in the mountains can change quickly, so always check the forecast regardless of the season.

Do I need any permits or pay entrance fees to ride in Bannau Brycheiniog National Park?

No, there are no general entrance fees or permits required to access the trails within Bannau Brycheiniog National Park (formerly Brecon Beacons National Park). However, always respect private land, follow the Countryside Code, and adhere to any specific local regulations or signage you may encounter on your ride.

Does this mountain bike loop intersect with other well-known paths?

Yes, this route incorporates significant sections of other established trails. You'll find yourself riding along parts of the Taff Trail (70% of the route), Lôn Las Cymru (South) (56%), and the Beacons Way (24%). Smaller sections also overlap with the Usk Valley Walk, Cambrian Way, and various parts of the historic Brinore Tramroad and Bryn Oer Tramroad.

Are there any places to eat or drink near the trail?

Yes, the village of Talybont-on-Usk, which is a common access point for the reservoir trails, offers various amenities. You'll find pubs and cafes there, making it a convenient spot to refuel before or after your mountain biking adventure.

What should I bring for mountain biking this loop?

Given the moderate difficulty and varied terrain, it's advisable to bring appropriate mountain biking gear, including a well-maintained bike, helmet, and suitable clothing for the weather. Carry plenty of water, snacks, a basic repair kit, and a first-aid kit. A map or GPS device (like Komoot's app) is also recommended for navigation.

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Trail Reviews

Riderrachy
July 6, 2023, Talybont - Brecons MTB

Starting in Talybont we took the super gentle climb up, the gradient is really gentle and great for groups to ride together. At the top the path opened up, we then cruised down to find a technical descent in the woods. Running out of time we bombed back on the road past the reservoir back to Talybont.

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