The "Erbawang Ancient Trail" originates from a small path in Ershui Township's Hsuimien Village Lioupit or near Minjen Township's Dayali Pit, ascending directly to the summit via winding forest paths. The trail is over a century old and comprises 28 bends, hence locally nicknamed "Erbawang" (28 bends in Chinese). In the past, it served as a critical route for mountain farmers carrying pineapples, tea leaves, and ginger by hand for trade in Ershui, and later transporting staple goods like rice and salt back home. Its frequent use led to the trail's natural formation, and even facilitated inter-municipal marriages, as community members collectively carried the bride's sedan over the trail through the shortest path to the groom's home, building bonds between Changhua and Nantou Counties. Over time, the trail fell into disrepair due to neglect and storm damage, becoming obscured by overgrowth. To rejuvenate local tourism, Ershui Township's government actively revamped the path, installing guiding signs and rest spots, transforming it into a scenic looped mountain trail.
This two-kilometer winding forest trail winds through the Bagua Mountain Range, offering beautiful scenery and diverse forest landscapes. Along the way, numerous native precious plants and animals, such as the Buddha's Seat Fern, Thorny Bamboo, Elephant Ear, Mountain Pith (Hsuan Ku), Golden Camellia, Cinnamon, Acacia, the Chinese Peacock Butterfly, Light Yellow Butterfly, Small Blue-spotted Butterfly, and various bird species, flutter among the trees. The trail also reveals many unidentified flora and unique soft boulder walls.