It’s a relatively flat hike of around 3-4hrs or 18km.
Catch bus 11 from Tung Chung, alight after the bridge over the reservoir. Continue from the reservoir for around an hour/5km and take the first trail on the left after the waterfall.
If you trace the coast, it continues through woods, abandoned villages, old farmland and empty beaches. Fan Lau Tsuen is a ghost village at the mid-point that was once home to 200 people.