1 SO056175 From the upper Blaen y Glyn car park, walk up the road for around 500m, to the second large track on the left. Ignore the track, but head uphill to the south instead. As the gradient eases, walk to the trig point at the top of Pant y Creigiau. Continue on a reasonably clear track to the east, staying close to the steep northern edge of the hill and passing through a saddle and up onto the hilltop of Bryniau Gleision. The track descends to meet a larger trail.
2 SO086159 Walk 300m to the south to pick up a fairly welldefined bridleway and follow it southwards to a disused quarry. Carefully pick a route through the quarry to reach a trig point on high ground overlooking the quarry, close to a distinctive cairn. Precise navigation is required to cross the moor to the east, staying on the highest ground before dropping steeply to the old quarry road, at a U-turn with one road leading uphill to the working Trefil Quarry.
3 SO114146 Set a bearing directly to Llyn y Garn Fawr, 2km to the east, and head uphill. There is a track on the
ground but it’s not immediately obvious. As you proceed further uphill, the track becomes well-defined and leads directly to the Chartist Cave, passing between two prominent cairns.
4 SO127152 Head southwards back along the same track before leaving to gain the cairn and high point Garn Fawr, just off the track. Pick a route down across the moor to the edge of the woods above the Crawnon Valley. Go through the gate and take the stony track down into the wooded valley.
The track emerges from the wood beside a stream and then continues to a gate leading on to the road.
5 SO101159 Turn right onto the road and then left at the next track, leading up towards Glasgwm Isaf Farm. A permissive path leads uphill on the edge of the farm and through a gate to access the bridleway behind the property. Follow this little-used trail uphill through the bracken to an open field and then through a gate to a broad farm track / bridleway. Continue to the north-east and a large track junction, with a stone bench and a sign indicating the now-defunct Brinore Tramroad. Turn right and walk around 100m to pick up the Beacons Way, heading downhill into the forest. Cross one forest road and then turn left at the next broad and flat track, following the Taff Trail back to emerge on the road above Blaen y Glyn car park once more.
Inside the Chartist Cave.
Talybont reservoir from Pant y Creigiau.