1-2 days one way. The length is 27 km on foot from trailhead.
The current is very strong in Dazhuoshui River, literally huge cloudy river. Wading is not easy. Only accessible in dry seasons. Water level swells quickly if it rains and Yilan is famous for abundant rain. Suck holes in the water might appear in huge boulders area in Mohen River.
Helmet, river tracing boots, life jacket, throwing bag, floating rope 30m and other trekking equipment
Technical difficulty: 5/5-6/5 (Experts only) Length of Route: 5/5