Kai Shan, Mountain summit in Yuen Long District, Hong Kong.

Kai Shan is a mountain summit in Yuen Long District, in the northwestern part of Hong Kong, rising to about 121 meters. Several foot trails lead up through local vegetation, varying in length and gradient depending on the route chosen.

The Yuen Long area surrounding Kai Shan has signs of human settlement going back to the early history of southern China. The surrounding flatlands were farmed and inhabited for centuries before the urban growth of Hong Kong reached this part of the territory.

Kai Shan is private land owned by the Tang clan, and the hill is reportedly burned regularly to keep the vegetation low. A neighbourhood trail leads to the top, where locals have planted flowers and made art, and from which both Yuen Long and Shenzhen can be seen.

The trail starts from a small path beside the Long Ping Estate bus stop. The hill is private land owned by the Tang clan and is burned regularly to keep vegetation low, so the route is open but bare in places. The climb is short and needs no special equipment.

From the top, the boundary between the Wang Chau urban area and open land is visible without any gradual transition. This sharp edge between city and countryside is rarely this clear from a single viewpoint in Hong Kong.