Amman Valley & Black Mountain loop from Llandeilo
Amman Valley & Black Mountain loop from Llandeilo
5.0
(1)
2
riders
03:12
43.9km
880m
Cycling
This difficult 27.3-mile touring cycling loop from Llandeilo explores the Amman Valley and Black Mountain in Bannau Brycheiniog.
Last updated: February 26, 2026
Tips
Your route passes through protected areas
Please check local regulations for:
Waypoints
Start point
Parking
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181 m
Highlight • Settlement
Tip by
12.9 km
Highlight (Segment) • Trail
Tip by
22.1 km
Highlight (Segment) • Viewpoint
Tip by
43.9 km
End point
Parking
Way Types & Surfaces
Way Types
25.4 km
9.88 km
7.94 km
543 m
< 100 m
< 100 m
Surfaces
24.2 km
19.1 km
624 m
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Elevation
Highest point (490 m)
Lowest point (30 m)
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Weather
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Friday 8 May
17°C
7°C
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This route was planned by komoot.
You can typically find parking in Llandeilo town centre, which serves as the starting point for this loop. Specific parking areas may vary, so it's advisable to check local signage upon arrival.
The route offers a dramatic contrast in terrain. The Amman Valley section, particularly the Amman Valley Cycleway, is generally gentler, traffic-free, and largely flat, winding alongside the River Amman. However, the Black Mountain section introduces significant challenges with substantial elevation gains, featuring steep, unrelenting climbs. Road surfaces are mostly paved but can be very steep in the mountain areas.
No, this loop is rated as "difficult" and requires very good fitness due to its significant elevation gain of around 880 meters (2,887 feet) over 43.9 km. The Black Mountain section, in particular, features formidable climbs that are challenging even for fit riders. It is not recommended for beginners.
The best time to cycle this route is generally from spring through autumn (late March to October). During these months, you'll experience more favorable weather conditions, with spring offering wildflowers like wild garlic and autumn providing vibrant foliage. Winter cycling can be challenging due to colder temperatures, potential ice, and less predictable weather in the exposed mountain sections.
Yes, the route offers several points of interest. You'll pass through Llandeilo Town Centre at the start. The Amman Valley provides views of woodlands, farmlands, and historical industrial elements. As you ascend into the Black Mountain, you'll be rewarded with breathtaking panoramic views, including the Black Mountain Climb from Brynaman, which offers far-reaching vistas across the Bannau Brycheiniog (Brecon Beacons) National Park and potentially to Pembrokeshire and the Bristol Channel on clear days.
Yes, sections of this route overlap with other paths. Notably, it covers parts of the Cycle across the Beacons (26%), Heart of Wales Line Trail (17%), and the Amman Valley Cycleway (6%).
Yes, towns like Ammanford and Brynaman, which are along the route, offer amenities such as cafes, bakeries, pubs, and shops where you can stop for refreshments and breaks. The Black Mountain Centre in Brynaman is also a good spot for food and local information.
While the route is primarily a cycling route, dogs are generally permitted on public rights of way within Bannau Brycheiniog (Brecon Beacons) National Park. However, it's crucial to keep dogs under close control, preferably on a lead, especially near livestock or in sensitive wildlife areas. Be aware that the challenging nature of the Black Mountain section might not be suitable for all dogs, particularly if you need to push your bike on rougher terrain.
No, there are no specific permits or entrance fees required for cycling on public rights of way within Bannau Brycheiniog (Brecon Beacons) National Park. However, always adhere to the Countryside Code, respect private land, and be mindful of local regulations, especially concerning livestock and wildlife.
The route offers opportunities to spot diverse wildlife. In the Amman Valley, you might see buzzards and red kites, and in spring, the area is rich with wild garlic and other wildflowers. As you ascend into the Black Mountain, you'll be immersed in the wild, open landscapes of the national park, where you might encounter various upland bird species and other native wildlife.
Given the significant elevation and challenging climbs of the Black Mountain, it's advisable to conserve energy during the gentler Amman Valley section. Ensure your bike is in excellent condition, especially your gearing, and carry sufficient water and nutrition. The rewards of the panoramic views are well worth the effort, but proper preparation is key for this demanding part of the loop.