[RWD version 1 ] Knocksink Wood on the outskirts of Enniskerry is a lovely nature reserve. After an easy 2 km hiking, the remaining 2 km of this wood gets gradually more challenging. Make sure to take a left turn over the bridge across the Glencullen River, and continue upriver into the wood as the gorge deepens. The wood gets wild and wonderful. Eventually, as you ascend steeply towards the road and away from the river below, take good care as it can be slippery and dangerous in wet conditions. For the 1 km road from there to Glencullen, it is advisable to wear a yellow vest for safety reasons. Glencullen Activity Park (GAP) offers a welcome coffee on a cold day, and is the access point for a new off-road hiking trail around the former golf course and onwards towards Three Rock. On this occasion, we chose to turn east just before reaching Three Rock, descending to the road at Barnaculia, crossing it, and then down through Fernhill to emerge onto the Enniskerry Road and Stepaside. An excellent and very satisfying hike. (We were delayed at the beginning of the hike, so one would expect to complete it in perhaps 45 minutes less than it took us on this occasion).