Black Mountain (SW #95) Bike Climb - PJAMM Cycling

Black Mountain (SW #95)

United Kingdom

All the cycling data and info you'll need to climb Black Mountain (SW #95)

Explore this Climb

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Climb Summary

Cycling Black Mountain, Wales - PJAMM Cycling jersey draped over bike parked along side of road near hillside, stone monument in background, blue cloudy skies, Simon Warren's #95 100 Greatest Cycling climbs logo in corner

Cycling Black Mountain, Wales.

Near the summit.

Coming in at number 95 of Britain’s 100 Greatest Cycling Climbs, Black Mountain begins on the A4069, about one kilometer south of Pont Aber, Carmarthenshire County, southern Wales.  The A4069 has a fair amount of traffic and is a narrow two-lane roadway along this segment.  Our climb is of moderate length by GCC 100 standards, at six kilometers and has a mild average grade of 5.7%.  There are no terribly challenging sections and the grade rarely exceeds 9%.

Cycling Black Mountain, Wales - straight segments of two-lane roadway, road signing warning of a Cattle grid, greenish brown pasturelands throughout hillside, blue skies, stone walls lining roadway, PJAMM Cycling logo in corner

The views along the way are generally obstructed by brush and trees for the first half of the climb, but open to rolling hills, grazing sheep, and distant views of farmlands for the second half of the climb.

Cycling Black Mountain, Wales - tree/brush-lined two lane road with blue sky in background, road sign for 40 kph

First part of the climb along A4069 bordered by brush/trees.

Cycling Black Mountain, Wales - open view of hillside covered in pastureland, white cow grazing, distant views of more pasturelands beyond, blue sky with fluffy white clouds

Open views and grazing sheep along second half of climb.

Cycling Black Mountain, Wales - view of stone monument along roadside on hill, plaque reads "Justin Davies, forever in our thoughts, ride on dear friend"

Plaque near top of climb for a motorcyclist killed in freak accident

when startled sheep ran into roadway as he travelled at just 43 kph (about 27 mph).


Steepest kilometer begins at 400 meters (7%).

The Black Mountain abandoned quarries give the climb its name. There are several hiking trails at the top of the climb that access Herbert’s Quarry.

Cycling Black Mountain, Wales - aerial view of Herbert's Quarry along hillside, blue sky, green hillsides, road traveling up right hand side

Long abandoned Herbert’s Quarry at the top of the climb.

Herbert’s Quarry is “a large area of abandoned limestone quarries in a stunning location on Black Mountain. The site has panoramic views over the Forest Fawr Geopark and the west part of the Brecon Beacons National Park. The Black Mountain Quarries are a time capsule of a very important aspect of Welsh industrial heritage. There are physical traces of lime exploitation spanning many hundreds of years with quarry workings, lime kilns, and spoil heaps from small scale local exploitation of the 1700s to large industrial use in the 20th century. As you explore the site, you are walking in the footsteps of many thousands of people whose hard work, sweat and drudgery shaped this landscape and left a rich industrial legacy”  (
Brecon Beacons - Black Mountain Quarries).

Cycling Black Mountain, Wales - bike parked along roadside, aerial views of pastureland with road traveling through it, PJAMM cycling jersey, PJAMM Cycling logo in bottom corner

Black Mountain climb is in the eastern section of Brecon Beacons National Park, Wales, established 1957 and achieving the status of International Dark Sky Reserve in February 2013. While much of the park is bare grassy pastures with Welsh mountain ponies and sheep, it is also known for its many remote reservoirs, waterfalls and caves, such as the 90 foot Henrhyd Waterfall and the Ogof Ffynnon Ddu Cave (Brecon Beacons National Park).