Sharp Peak, Sai Kung's Most Difficult Hike
Sharp Peak (蚺蛇尖) is considered the most challenging hike in Sai Kung. The main reason for this is because of the steepness of the ascent.
Gubeikou (古北口) fits the bill perfectly. It's one of the easier sections to hike, it typically draws few tourists, and the surrounding landscape is spectacular. It's only a few short hours from Beijing, so if the Great Wall is on your travel radar, Gubeikou is a great section to consider visiting.