On March 9, 1987, the Batongguan Historical Trail was listed as one of the first grade national historical landmarks by the Ministry of the Interior. On January 1 of the same year, Yushan National Park Headquarters asked Yan Nan-jiunn to conduct a survey of the Batongguan Historical Trail. The main section of the Batongguan Historical Trail runs from Linpipu (now Jhushan), Fenghuang Hills, Maopu (Aiguo Village, Sinyi Hsiang), Heshui (Heshe), Dongpu, Batongguan, to Dashuiku, and follows the northern bank of the Lakulaku River down to Pushige (Yuli), running a total of 152.64 km. This study had used six months to complete the survey of the 89.28 km stretch of the trail from the west of Dashuiku of the Central Mountain Range to Jhushan. Conditions along the study area had been faithfully recorded and the results showed that 80% of the west part of the Batongguan Historical Trail is still utilizable, with only a few sites where river wash and landslides had occurred needing restoration. With the removal of the profuse trees and dwarf bamboos, the historical trail could be completely cleared for utilization.