Cloudy Hill, Mountain summit in Tai Po District, Hong Kong.

Cloudy Hill (Kau Lung Hang Shan) is a 440-metre hill in Tai Po District, northeastern Hong Kong, inside Pat Sin Leng Country Park. It has two peaks: the main summit Tai Shan Tung and a 419-metre sub-peak, Tai Shan Mei. The Ma Wat River rises on its slopes, and the Wilson Trail's Stage 8 ends and Stage 9 begins at the top.

Cloudy Hill lies within Pat Sin Leng Country Park, designated in 1978 as Hong Kong's third country park. The summit carries a digital terrestrial television broadcasting station serving Ma On Shan, Tai Po, Fanling and Sheung Shui. A 60-year-old man died on the trail on 23 May 2021, when temperatures reached 37°C.

The hill's name comes from Kowloon Hang, the valley at its western foot, not from Kowloon in the south. Its two peaks are named Tai Shan Tung (main) and Tai Shan Mei (419 m). The English name Cloudy Hill is a translation of the Chinese sense of cloud-covered summit.

The Wilson Trail's Stage 9 begins at the 440 m summit, and the climb is steep with some very difficult sections of trail. The summit holds a digital television broadcasting station serving Ma On Shan, Tai Po, Fanling and Sheung Shui. A hiker died here on 23 May 2021 when temperatures reached 37°C, so carry ample water and avoid the hottest hours.

The summit holds a major transmitter station for Hong Kong's digital terrestrial television, serving Ma On Shan, Tai Po, Fanling and Sheung Shui. The hill has two peaks: the main Da Shan Dong and the 419-metre Da Shan Wei. A 60-year-old hiker died here on 23 May 2021 in 37-degree heat.