You can park opposite the phone box at the road junction at SH663080. Follow the path past Caeberllan a short distance to a gate, then head upwards due E to meet an unmarked track which ascends from the 700’ contour on an easy gradient to the summit ridge from where the summit is easily reached (The track appears to join the marked path which meets the road at SH670074).
(1hour 15 mins, 2.5 miles, 1200’ of ascent)