Plan your visit to Y Pigwn and Waun-Ddu

Y Pigwn Roman marching camp and Waun Ddu Roman fortlet are near the Black Mountain, in the west of the Brecon Beacons National Park. If you've left your chariot at home, you may wish to travel by public transport.

How to get there

Nearest town or village

Trecastle  (LD3 8UQ)

OS grid reference



The bus service between Llandovery and Brecon stops at Trecastle, which is within walking distance of Y Pigwn and Waun-Ddu. 


Llandovery on the Heart of Wales line is the nearest railway station, 5.5 miles from Y Pigwn and Waun-Ddu. From here you can catch a bus or taxi. For up to date travel information and timetables, visit or phone 0871 200 2233.


Trecastle is located on the A40 between Llandovery and Sennybridge. Turn off the A40 opposite the bus stop and head up the hill for approximately half a mile. Take the small lane on the right hand side and follow this for just under 2 miles until you reach a cattle grid. Please park sensitively ensuring you do not block any gates as they are in constant use.

The walking trail

Distance and terrain

The walking trail which leads around the site is 4 miles there and back. You will start out along a track, which can be very wet at any time of year, and will also venture off road and across and boggy moorland. The route is fairly flat with one short climb up to the summit of Y Pigwn, the highest point at 412m. Waterproof footwear with a good grip is recommended.


Even when it’s dry and warm when you set out, weather conditions can change quickly in the hills and become wet and cold. Be sure to look at the checklist on the app when packing your kit.

Mobile signal

You can’t rely on getting mobile phone coverage along the route. Remember to tell someone where you’re going and when you expect to return.

Enjoy your adventure!