Also called the Nenggao West section, this trail starts at Tunyuan (屯原; elevation 2041m) at the end of Hwy 14 and ends the first day at Tienchi (天池; elevation 2860m), with the average hiker taking about five or six hours to walk in. Tienchi has a cabin where you'll find beds, a kitchen and water. You can also camp.

The next day Nenggaoshan North Peak (能高北峰; elevation 3184m) and Chilai South Peak (奇萊主山南峰; elevation 3358m) can be climbed in one long day with a return to Tienchi cabin.

The return to Tunyuan takes three hours.