Park at Speculation car park off the B4234 at GR613135. This is a varied walk through woodland and farmland. Part of the walk uses the old railway line from Mirystock to Lydbrook.This moderate/ strenuous walk has one long steep climb of over 130 metres and several other long gradients. There are 7 stiles. Please bring plenty of water and a packed lunch. The walk goes through Serridge Inclosure to Mirystock and then along the former railway line to Lydbrook. There is a steep climb to Eastbach Airfield before dropping down into the valley and following the Wysis Way back to the carpark.