Pentwyn Reservoir and Talybont Reservoir loop
Pentwyn Reservoir and Talybont Reservoir loop
4.1
(14)
99
riders
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
Start point
Parking
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1.57 km
Highlight (Segment) • Viewpoint
Tip by
5.04 km
Highlight • Viewpoint
Tip by
5.19 km
Highlight • Viewpoint
Translated by Google •
Tip by
17.2 km
Highlight • Trail
Tip by
20.1 km
Highlight • Structure
Tip by
27.7 km
End point
Parking
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
Highest point (510 m)
Lowest point (210 m)
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Weather
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Saturday 9 May
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This route was planned by komoot.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.