Kau Nga Ling (狗牙嶺) is another 5-star challenging hiking trail in Hong Kong. To reach Kau Nga Ling, there has 3 common routes, West Kau Nga Ling (西狗牙嶺), Mid Kau Nga Ling (中狗牙嶺) and East Kau Nga Ling (東狗牙嶺).
The caches here are to lead you from Shek Pik Country Trail (石壁郊遊徑), pass Mid Kau Nga Ling, Mid Kau Nga (中狗牙), East Kau Nga (東狗牙), "a slim chance of survival" (一線生機), Yama's Wall (閻王壁) till Tsam Chai Au (斬柴坳).
Although this route is the easier one against another two. It is still not easy for non-experience hikers, all caches were placed within 3 meters away from the path. Don't go too far. Check spoiler if you have no idea.