You can hike this 7km trail from Fenqihu all the way to Rueili in about three to four hours. Much of the trail runs through bamboo forests that look like something out of a wushu (martial arts) film. In Rueili, the trail ends (or begins) on the main road into town, close to hotels, restaurants and the visitor centre. The trail is mapped and signed in English.
The trail is one of very few places in Taiwan where you'll find 'square bamboo' (四方竹), bamboo with a squarish cross-section. They were planted here and in Xitou by the Japanese, who had supposedly taken cuttings of the plant from Sichuan in China.