Devil's Peak, Military fortification peak in Sai Kung District, Hong Kong.

Devil's Peak is a pyramidal mountain in Sai Kung that rises 222 meters above sea level and is topped with stone fortification remains. It overlooks a large cemetery and provides views across Victoria Harbor and the Lei Yue Mun passage.

British forces built multiple defense structures on the peak between 1900 and 1914, including Gough Battery and Pottinger Battery to guard the harbor entrance. These fortifications were part of a larger defensive system controlling the strategic waterway.

The peak's official name, Fortress Hill (炮台山), comes from the batteries the British built there in the early 20th century. The Chinese name Devil's Peak (魔鬼山) was already in use, and both remain current. The ridge is bordered by the Junk Bay Chinese Permanent Cemetery, and Section 3 of the Wilson Trail crosses its foot.

Section 3 of the Wilson Trail passes the foot of the peak and can be joined from Tiu Keng Leng or Yau Tong via the cemetery roads. The summit redoubt sits at 222 metres, with Gough Battery at 160 metres and Pottinger Battery at 81 metres on the slope below. The military structures stand on unallocated government land managed by the Lands Department.

During the 19th century, pirates used the peak as a strategic post to monitor merchant ships passing through Lei Yue Mun strait. This illicit activity shows how important the location was for controlling a major shipping route.