The Chulu Cliff Path and the Liwu River Excavation Path are two tracks within the park that are not planned routes, and their level of difficulty is probably the highest.
再往前走可到第二水濂洞，終點是有「小九曲」之稱的塔次基裡溪溪谷，全程往返約要六小時。至於不在規劃範圍內的錐鹿和立霧溪掘鑿曲流，算是難度較高的兩條古道。