The trail follows the historical Nenggao Ancient Road, which was used as a cross-island communication line during the Japanese colonial period.
The route features remains of historical power line towers that were part of the 1950s 'Nenggao Cross-Island Power Transmission Project'.
It is a primary access point for mountaineers heading toward Qilai South Peak and Nanhua Mountain.
The trailhead area itself sits at an elevation of approximately 2,000 meters above sea level.
The trail is prone to temporary closures after heavy rainfall due to the high risk of slope instability and rockfalls.
Tunyuan Trailhead serves as the primary eastern access point for the Nenggao Cross-Ridge Historical Trail in Nantou County. The trail connects the trailhead to the remote Tianchi Cabin and ultimately crosses the Central Mountain Range toward Hualien. Historically, this route follows a Japanese-era patrol path constructed for administrative and surveillance purposes across the mountains. The terrain transitions from mid-altitude hardwood forests to sub-alpine meadows as elevation increases significantly beyond the start. The area is prone to landslide risks due to steep, unstable geology typical of Taiwan's central highlands. Hikers must secure relevant entry permits from the National Police Agency and Taroko National Park authorities before arrival. The trailhead sits at the end of a winding mountain road near the Lu-Shan hot spring region.
The initial scenic outlook points overlooking the deep valleys shortly after passing the trailhead gate.
Obtain mountain entry permits online at least seven days before your trip.
Check the latest status of the trail on the Forestry Bureau or local police websites, as landslides frequently cause trail damage.
Carry trekking poles and high-traction footwear to navigate muddy and steep sections.
Bring enough water and high-energy snacks as there are no facilities between the trailhead and mountain huts.
Attempting the hike without checking updated trail closure notices; underestimating the rapid weather changes at high altitudes.
Frequently closed during typhoon season or after heavy seismic activity; requires mandatory mountain entry permits.
Strict 'Leave No Trace' principles apply; mountain permits are mandatory; smoking is prohibited due to extreme fire risks in high-altitude forests.
