Route-Take the Taff Trail from Pontypridd, through Cilfynydd to Abercynon. From the Navigation Inn in Abercynon, go through the car park and find a lane through a short street with a footpath at the end. Follow this foot[path up onto the road, turn Right then take the first Left up the hill to Abercynon Golf club. Just before the car park take a grassy track on the Right and come out on the road by Llechwen Hall. Follow the lanes to Llanfabon Inn, then take the lane to Nelson. Turn Right up the hill and keep going until you get to the open mountain. At this point there is a good track on the Left, which heads to the Left of Mynydd Eglwysilan, then carries on straight for 2 miles, past the pointy top tips (on the Left) until you get to Pen Yr Heol Las Farm, with wonderful views over Caerphilly. At this point follow the wall of the field on the Right across the grassy hill top, and drop down onto a grassy track heading Left downhill. As you go through a gate, it turns into a rough gravel lane, then comes to a minor road. Take this downhill into Penyrheol.