The Ultramarathon de Sai Kung is an ultra endurance race that takes place in Sai Kung Peninsula of Hong Kong.  The 100km course starts in Pak Tam Chung and covers some of the most beautiful scenery in Hong Kong, including remote and unspoilt beaches, ancient forests, nature trails, reservoirs and steep hills.  The course is totally inside the  Sai Kung Country Park but with Pak Tam Chung at the centre of the course. The course involves a cumulative elevation gain of over 5,000 meters and the cut-off time is 35 hours.  This is a challenging and beautiful ultra trail running course which is ideal for the beginners to have the first 100km race.