Fan Brycheiniog and Fan Hir from Tafarn-y-Garreg

The walk starts at Tafarn-y-Garreg on the A4067 in the upper Swansea Valley. Cross the road and take the path to the left of the inn's car park to a footbridge over the Tawe. The way climbs the hillside to Allt Fach and then follows the ridge of Fan Hir for about 4 km, with the scarp falling away on the right. It drops to Bwlch Giedd and climbs to the trig point and stone shelter of Fan Brycheiniog, 802 m, and on to the far end of the summit ridge. The return is back to Bwlch Giedd, down the stone staircase to Llyn y Fan Fawr, and south along the foot of the escarpment to rejoin the outward path.

It is 12.4 km with 635 m of ascent; allow about 5 hours. The grade is Moderate.

Low cloud is common and comes in fast. The path up to Allt Fach is confused by sheep tracks, parts of the return under the scarp are pathless and boggy, and there are steep drops off the edge: take a map and compass.

There is no public car park at the start: parking is by the roadside or, by arrangement, at the inn. The nearest public car park is at Craig-y-nos Country Park, about 2 km down the valley. The T6 bus between Swansea and Brecon runs up the valley.

Route drawn by Global Adventurer along OpenStreetMap paths (© OpenStreetMap contributors, ODbL), with figures worked out from it. Check the forecast and the ground on the day: paths change.