This is a difficult loop trail to 25K 工寮 in 南湖中央尖山群生態保護區.
This trail goes by 23.2K閂山登山口〈H2835M〉, 閂山, 27K鈴鳴山登山口, 鈴鳴山, 人待山, and 人待山北峰.
★★★★★