4.3
(162)
3,029
riders
44
rides
Mountain biking around Cwm offers a diverse landscape characterized by rugged, glacially sculpted valleys and steep crags. The region features distinctive bowl-shaped formations, moraines, and glacial lakes, providing varied terrain for riders. Expect challenging downhill runs and unique features across its trails, set against a backdrop of dramatic natural beauty.
Last updated: June 22, 2026
4.6
(9)
253
riders
Hard mountain bike ride. Good fitness required. Advanced riding skills necessary. Some portions of the route may require you to push your bike.
5.0
(1)
48
riders
52.6km
04:57
1,150m
1,150m
Hard mountain bike ride. Very good fitness required. Advanced riding skills necessary. Some portions of the route may require you to push your bike.

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4.6
(5)
16
riders
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
5.0
(9)
17
riders
28.7km
02:08
350m
350m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
5.0
(1)
5
riders
88.6km
07:04
1,330m
1,330m
Hard mountain bike ride. Very good fitness required. Advanced riding skills necessary. Some portions of the route may require you to push your bike.
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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.
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This is great fun, I've done both descents now, both north and south but neither climb, and I'm very happy about that. Would want an unloaded bike to clean the whole trail.
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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.
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This area is also great for some technical trail running. Plenty of footpaths meander around the hills.
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is the largest stillwater reservoir in the central Brecon Beacons at 318 acres
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gorgeous views, very popular with walkers, so be aware
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Great stop off point food and refreshments, especially after a tough climb and decent and Before arriving at Pontsticill reservoir
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Mountain biking around Cwm offers a diverse landscape characterized by rugged, glacially sculpted valleys and steep crags. The region features distinctive bowl-shaped formations, moraines, and glacial lakes, providing varied terrain for riders. You can expect challenging downhill runs and unique features across its trails, set against a backdrop of dramatic natural beauty.
There are over 45 mountain bike trails available around Cwm, catering to various skill levels. The komoot community has rated these routes highly, with an average score of 4.3 stars.
Yes, Cwm offers several options suitable for beginners. There are 6 easy trails and 33 moderate trails, providing a good range for those looking for less challenging rides or to build their skills. While specific beginner routes aren't highlighted in the top list, you can find suitable options by filtering for 'easy' difficulty on komoot.
For experienced riders seeking a challenge, Cwm has 8 difficult trails. One notable difficult route is The Gap Pass – View of Talybont Reservoir loop from Gilfach Fargoed, which is 55.0 miles (88.5 km) long and features extensive riding through varied landscapes. Another is Dragon Run, Cafall Trail – Odin Section on Twrch Trail loop from Newbridge, a 29.3 miles (47.2 km) path combining sections of the renowned Cafall and Twrch trails.
Many of the mountain bike trails in Cwm are designed as loops. For example, View of Bryn Oer Tramroad – Cwm Callan Roman Road Trail loop from Ebbw Vale Town is a 27.6 miles (44.4 km) loop that takes you through historical tramroad and Roman road landscapes. Another option is View of Taf Fechan – View of Pontsticill loop from Georgetown, a moderate 28.5 km (17.7 miles) loop.
The Cwm region is known for its dramatic, glacially sculpted landscapes, including distinctive bowl-shaped formations, moraines, and glacial lakes like Llyn Idwal. Along the trails, you might encounter various viewpoints and natural monuments. For instance, you could explore highlights such as Blorenge summit or the Trig point at Mynydd Twyn-glas summit, offering panoramic views of the surrounding area.
Yes, the Cwm area is close to dedicated mountain bike parks and trails. For example, you can find highlights like Rocky Valley, Cafall Trail and Bike Breaker Descent, Blorenge, which are part of the broader network of trails and bike parks around Cwm.
The best time to go mountain biking in Cwm generally depends on weather conditions. While the region offers year-round access, appropriate footwear and wet weather clothing are recommended due to unpredictable weather, especially in higher elevations. The 'Cwm Mountain Bike Trails' are known to offer a 'super super crazy ride' on both dry and wet sand conditions, suggesting they can be enjoyed in various seasons, but checking local conditions is always advisable.
Cwm Idwal is a spectacular destination known for its unique geology and as Wales' first National Nature Reserve, offering breathtaking scenery for hikers and nature lovers. While it provides challenging terrain, specific mentions of dedicated mountain biking trails often refer to other locations or specially designed 'Cwm Mountain Bike Trails' that cater to downhill riding. For more information on Cwm Idwal's natural beauty, you can visit visitmidwales.co.uk.
The mountain bike trails in Cwm are highly rated by the komoot community, with an average score of 4.3 stars from over 140 reviews. More than 3000 mountain bikers have used komoot to explore Cwm's varied terrain, often praising the diverse landscapes and challenging features.
While specific cafes, pubs, or accommodation directly on the trails are not detailed, the presence of towns like Ebbw Vale and Newbridge as starting points for routes suggests that amenities are available in the surrounding areas. For example, the route View of Bryn Oer Tramroad – Cwm Callan Roman Road Trail loop from Ebbw Vale Town starts from Ebbw Vale, a town likely to offer various services.


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