Beyond the police substation at Yulao, the road is paved with broken rock, so although only about 60km long it takes about four hours to drive, and requires a four-wheel drive vehicle with a raised chassis.
從尖石到道路終點，路長約六十公里，過了宇老派出所之後就是石頭路，距離雖不長，開車卻要四個小時，而且還須高底盤、配備四輪傳動的車輛方能克服顛簸之路。