The area is geologically part of the Lio-Shan formation, consisting primarily of gravel and sandstone that erodes into knife-edge ridges.
It serves as a primary habitat for the endemic Formosan pangolin and various raptor species like the crested serpent eagle.
The name 'Jiujiufeng' translates to 'Ninety-Nine Peaks' due to the serrated, sawtooth appearance of the mountain range.
The trail was significantly rehabilitated following massive landscape alteration caused by the 1999 Chi-Chi Earthquake.
Jiujiufeng Forest Trail is a 2.5-kilometer loop trail located within the Jiujiufeng Nature Reserve in Nantou County. The trail is defined by its dramatic badland topography, characterized by sharp, weathered peaks formed by the 1999 921 Earthquake. Visitors ascend a steep staircase section that leads to an observation deck providing panoramic views of the Dadu River valley and the surrounding Nantou plains. The path transitions from subtropical broadleaf forest to exposed, unstable rocky ridges. The reserve is specifically designated to protect the ecological recovery and unique geological formations of this area. Elevation gain is approximately 200 meters, requiring moderate physical effort. The trail surface consists of a mix of wooden stairs, dirt paths, and gravel sections.
The highest wooden observation platform offering a 360-degree view of the sawtooth peaks and the valley.
Bring a trekking pole, as the steep wooden steps can be taxing on the knees during the descent.
Apply sunscreen and insect repellent generously, as the ridge sections are almost entirely exposed to direct sunlight.
Hydrate well before starting; there are no water refill stations or shops once you enter the trail loop.
Do not attempt the hike during or immediately after heavy rain, as the gravelly terrain becomes extremely slippery and prone to landslides.
The trail may be closed during periods of extreme weather, such as typhoons or heavy monsoon rainfall.
Stay strictly on the marked path to prevent soil erosion; do not disturb or feed local wildlife.
