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United Kingdom
Wales
South Wales
Carmarthenshire
Llandeilo

Amman Valley & Black Mountain loop from Llandeilo

Hard

5.0

(1)

2

riders

Amman Valley & Black Mountain loop from Llandeilo

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:

Bannau Brycheiniog National Park

Waypoints

A

Start point

Parking

Get Directions

1

181 m

Llandeilo Town Centre

Highlight • Settlement

Llandeilo can lay claim to being one of the prettiest towns in Wales, a charming place with superb inns and an interesting range of independent shops, cafes and restaurants.

Surrounded …

Tip by

2

12.9 km

Amman Valley Cycleway

Highlight (Segment) • Trail

For families especially, but also those who prefer a more gentle ride, the route is ideal because apart from a descent near Pontamman it follows the river bank and is flat.

Tip by

3

22.1 km

Black Mountain Climb from Brynaman

Highlight (Segment) • Viewpoint

The Black Mountain Category 3 Climb from Brynaman is a 5.5km climb with a total ascent of 312m, topping out at 495m. The average gradient is 5.8% with the steepest …

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B

43.9 km

End point

Parking

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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

Elevation

Nothing selected – click and drag below to see the stats for a specific part of the route.

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.

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Frequently Asked Questions

Where can I park to access the Amman Valley & Black Mountain loop from Llandeilo?

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.

What is the terrain like on this cycling route?

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.

Is this cycling loop suitable for beginners?

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.

What are the best times of year to cycle this route?

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.

Are there any notable viewpoints or landmarks along the way?

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.

Does this route intersect with other well-known cycling paths?

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%).

Are there any cafes, pubs, or shops available along the route?

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.

Is the Amman Valley & Black Mountain loop dog-friendly?

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.

Do I need a permit or is there an entrance fee for cycling in Bannau Brycheiniog National Park?

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.

What wildlife can I expect to see on this route?

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.

Is there an insider tip for tackling the Black Mountain section?

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.

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