Cloudy Hill or Kau Lung Hang Shan (Chinese: 九龍坑山) is a 440m high hill in Tai Po District of northeastern Hong Kong.

It is located within Pat Sin Leng Country Park.

The source of the Ma Wat River is located on Cloudy Hill.

Stage 9 of the Wilson Trail starts from the top of the hill.

This article related to a mountain or hill in Hong Kong is a stub.