The trail was closed to civilians from 1968 to 2009 due to security concerns following the January 21 Incident in Seoul.
Access is strictly limited to 1,000 visitors per day from each side to minimize human impact on the ecosystem.
The name 'Uiryeong' translates to 'the mountain pass between Ui-dong and Uijeongbu'.
The route serves as a habitat for several endangered species, including the leopard cat and the Korean water deer.
The trail features a unique mix of deciduous forest that changes significantly in appearance between the summer canopy and autumn foliage.
Uiryeong-gil is a restricted-access trail connecting Gangbuk-gu, Seoul, and Uijeongbu, winding through the northern section of Bukhansan National Park. The trail spans approximately 6.8 kilometers and follows an old mountain pass that was closed to the public for 41 years for military security reasons. It was reopened in 2009 with a strictly enforced reservation system to limit daily visitor numbers and preserve the ecological environment. The path offers a gentle gradient, contrasting with the rugged, steep peaks typical of other Bukhansan routes. It passes near the iconic Obong peak, a cluster of five granite rocks that are prominent landmarks of the area. Visitors traverse a lush, forested valley that serves as a vital corridor for local flora and fauna. Because it is a protected area, the trail maintains a natural, undisturbed aesthetic compared to more commercialized hiking paths.
The wooden observation deck offering a clear view of the Obong peaks.
Reservations must be made online in advance through the official Bukhansan National Park website to gain entry.
Bring valid photo identification, as park rangers verify IDs against the reservation list at the trailhead.
Ensure your mobile device is fully charged, as digital confirmation is often required for entry.
Attempting to enter without a confirmed reservation, as entry is strictly denied to unregistered hikers.
Requires mandatory advance online reservation; closed during extreme weather conditions such as heavy rain or high fire-danger periods.
Hikers must remain on the designated path at all times; taking photos of military installations or fence lines is strictly prohibited.
