Start: 41A bus to Elegant Court / Marymount Primary school bus stop https://wikiroutes.info/en/hong-kong?routes=39650
Finish: Fortress Hill MTR (shorter alternative Repulse Bay beach)

Near the bus stop (127m above sea level already) are steps giving quick access to a flat easy catchwater path - the pleasant Wong Nai Chung Gap Trail good for running or getting to the nearby hills. You can go up to Violet Hill or contour level south like I did. https://bluebalu.com/2016/04/11/hiking-wong-nai-chung-gap-trail/ At the reservoir road go uphill to the dam where another catchwater path cut into the steep hillside above Repulse Bay (great views!) eventually connects with the Wilson Trail at the col north of the Twins. Went up and down all the steps then headed home via Tai Tam West catchwater, Hong Kong Trail and Mt Parker rd. Other times I’ve returned to the north col then dropped down to finish on the beach at Repulse Bay.