It is located at the summit of Mount Lulin, on the border of Chiayi County and Nantou County, near Yushan National Park.
The section from Meishan to Yakou Tunnel lies within Yushan National Park.
The Chenyoulan (陳有蘭溪), Jyunda (郡大溪), Nanzaisian (楠梓仙溪), Laonong (荖濃溪), and Lekuleku(拉庫拉庫溪) rivers are all young rivers from Yushan with V-shaped river bed.
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