Will you hike the Three sharp peaks in Hong Kong? These 3 peaks are scattered in different regions in Hong Kong. 1. High Junk Peak (344m) in Clear water Bay 2. Castle Peak ( 583m) in Tuen Mun 3. Sharp Peak ( 468m) in Sai Kung It offers a unique hiking experience for those who have a sense of adventure because of loose rocks and steep inclination. While Castle Peak is the tallest of the three, Sharp Peak is generally considered the hardest of the three to hike up because of its remoteness and steepness.