HK trail section 5 Starts from Park View (already actually from the road leading to Park view but that part is boring) and offers some nice climbing and views. The trail goes via two peaks, Jardine’s lookout and Mt. Butler. You see the sea, the reservoir and the hills. After some 4km the trail ends at Quarry Gap.
From Quarry Gap, you can continue on HK trail section 6 which is mostly downhill for some 4.5km and going in the end on the side of the reservoir.
And, if you’re still up for some more walking, you can continue on section 7, or just go back to the city 🙂