4.4
(17)
152
riders
19
rides
Gravel biking around Merthyr Tydfil features routes through the South Wales Valleys, characterized by a landscape of reservoirs, forests, and rolling hills. The region offers varied terrain, including former railway lines, forest tracks, and quiet country lanes, providing diverse surfaces for gravel cyclists. Elevation changes are common, with routes often incorporating climbs and descents through wooded valleys and open moorland.
Last updated: May 5, 2026
5.0
(1)
42
riders
52.4km
03:18
850m
850m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
5.0
(2)
7
riders
20.6km
01:32
540m
540m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

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5.0
(1)
2
riders
21.5km
01:41
410m
410m
Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
4.0
(2)
15
riders
Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
4.0
(2)
9
riders
43.1km
02:47
630m
630m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
4.0
(2)
6
riders
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
4.5
(2)
3
riders
13.7km
00:57
240m
230m
Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
3
riders
55.6km
04:01
770m
770m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
5
riders
40.1km
02:42
570m
580m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
5.0
(1)
17
riders
74.4km
04:28
1,000m
1,000m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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Mountain Hikes around Merthyr Tydfil
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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Cracking Cafe open, Sat Sun and Wed year round.
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lovely . ( no phone signal ) bring yourself a drink and enjoy the view
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One of my favourite places in the Beacons for cycling or hammock camping.
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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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is the largest stillwater reservoir in the central Brecon Beacons at 318 acres
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There are over 20 gravel bike trails documented around Merthyr Tydfil on komoot, offering a variety of experiences through the South Wales Valleys. These routes range from moderate to difficult in intensity.
Gravel biking around Merthyr Tydfil is primarily suited for moderate to difficult ability levels. Out of 22 available routes, 6 are rated as moderate and 16 are considered difficult, often featuring significant elevation changes and varied terrain.
Yes, there are several moderate routes. For example, the Pontsticill Reservoir – Pontsticill Reservoir loop from Cefn-coed-y-cymmer is a 19.3-mile (31.0 km) trail that offers a scenic ride around the reservoir without the extreme challenges of some of the more difficult routes. Another good option is the Talybont Reservoir – View of Talybont Reservoir loop from Aber.
The terrain around Merthyr Tydfil is diverse, featuring former railway lines, forest tracks, and quiet country lanes. You'll encounter a mix of surfaces, from smooth gravel paths to more rugged sections, often with climbs and descents through wooded valleys and open moorland.
Many of the gravel bike routes in Merthyr Tydfil are circular, allowing you to start and finish at the same point. A popular example is the Talybont Reservoir – Pontsticill Reservoir loop from Merthyr Tydfil, which connects two major reservoirs.
The routes often pass by significant natural and man-made features. You can expect views of reservoirs like Pontsticill Reservoir and Llwyn-on Reservoir Dam. Some trails also incorporate sections of the Taff Trail Tramroad Section and pass by the historic Pontsarn Viaduct.
While specific wild swimming spots are not explicitly marked on all routes, the region's natural beauty includes features like Pontsarn Blue Pool, which is a natural pool. One route, Waterfall – Nant Glydach Reservoir and Dam loop from Llanwonno, explicitly mentions a waterfall in its name, suggesting scenic water features along the way.
The South Wales Valleys offer gravel biking opportunities year-round, but spring and autumn generally provide the most pleasant conditions with milder temperatures and vibrant scenery. Summer can be excellent, though some trails might be busier. Winter rides are possible but require appropriate gear for potentially wet and colder conditions.
The area is highly rated by the komoot community, with an average score of 4.4 stars from over 17 reviews. Reviewers often praise the diverse terrain, the scenic reservoir-side paths, and the challenging yet rewarding valley climbs that define the region's gravel biking experience.
Yes, for experienced riders seeking a challenge, the Pontsticill Reservoir – Monmouthshire and Brecon Canal loop from Merthyr Tydfil is a difficult 46.2-mile (74.3 km) route with over 1000 meters of elevation gain, offering an extensive exploration of the area.
Many trailheads, especially those around the major reservoirs like Pontsticill and Talybont, offer designated parking areas. It's advisable to check specific route details on komoot for recommended starting points and parking information, as options can vary.


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