Bowen Road is probably the signature run in Hong Kong. Carved out into the side of a hill, this relatively flat, paved path runs about 4k one-way, providing great views of Central and Wanchai just below. There are fitness stations along the way, and the canopy provides reasonable shade. The highlight of the run is Lover’s Rock, which is toward the eastern terminus of the path. There is access from numerous points, but the best bet is up Kennedy Rd. from Wan Chai station (this part accessing the trail is steep — might have to be walked).
Nice add-on: Get off the Bowen Rd. path and take the Wan Chai Gap trail and the Dutch Path, which adds about 1 mile one-way.