金字碑古道入口 Jinzibei Historic Trail Entrance
A part of the Danlan Historic Trail, Jinzibei Historic Trail cuts across Sandiaoling, continues on to the Old Caoling Tunnel and stretches all the way to Lanyan Plain in Yilan County. Though less well-known than the Old Caoling Tunnel, it is equal in recreational value. (site from https://tour.ntpc.gov.tw/en-us/attraction/Detail?wnd_id=85&id=111587 )
This is the entrance from Houtong. You could go from this entrance, along the old trail, to Mudan railway station. Note that The cache was placed before the entrance of Jinzibei.