© The Automobile Association 2008. © Crown Copyright Licence number 100021153
1 Walk uphill from the car park and pass an information plinth before crossing a stile. Walk along the right-hand side of the field to the top right-hand corner and then bear left to continue along the fence to another stile.
2 Follow the broad but faint grassy track straight on. It gradually becomes a better-defined stony track that swings slightly left and climbs the hillside. Continue ahead, up towards the head of Cwm Gwdi, and keep ahead, ignoring a few right forks, until the path eventually levels out on Cefn Cwm Llwch.
3 Continue along the ridge towards the summit ahead. As you reach the foot of the peak, the track steepens considerably, offering a fine viewpoint over a perilous gully that drops into Cwm Sere on the left. Continue to climb steeply over a few rocky steps to reach the summit cairn on Pen y Fan.
4 Bear right to follow the escarpment edge along and drop into a shallow saddle beneath the rising crest of Corn Du. Continue up on to this summit, then bear left to drop down through rocky outcrops on to easier ground below. Bear sharp right once you reach the grassy hillside to walk north beneath the peak.
5 Continue down the hill and pass the Tommy Jones obelisk (PBackground to the Walk) with the steep crags of Craig Cwm Llwch on your right-hand side. Above the lake, the path forks; take the right-hand option and drop steeply, around a dog-leg and over moraine banks to the lake shore.
6 A clear track leads north from the lake; follow it over easy ground to cross a wall that leads on to a broad farm track. Take this down to a gate in front of a building and climb the stile on the left. Cross the compound and climb another stile to follow waymarker posts around to the right on to another track, beyond the building.
7 Bear left on to this track and follow it down, over a footbridge, to a parking area. Keep straight ahead, through a gate to a T-junction, where you turn right. Cross the bridge and continue for over a mile (1.6km) to another T-junction. Turn right and walk uphill back to the car park.