Jangsan Mountain

The trail starts right behind the apartment blocks of Haeundae New Town, and within minutes you reach slopes buried under huge boulders. At 634 m, Jangsan is the second-highest mountain in Busan, and the landforms left by volcanic activity some 70 million years ago make it a geosite of the Busan National Geopark. From the ridge you look straight down on Haeundae's seafront and Gwangan Bridge.

A mountain made by a volcano

Jangsan is built from ash, lava and pyroclastic flows thrown out by violent rhyolitic eruptions at the end of the Cretaceous. Traces of a caldera survive, which makes the mountain important for understanding volcanic activity in southeastern Korea. Its most striking feature is the boulder fields Korean hikers call neodeol: blocks that broke off the cliffs and slid down the slopes. On Jangsan these talus streams spread out in nine separate tongues.

The lower slopes are home to trees typical of Busan's hills: red-fruit spicebush, the white-barked tallow tree that is said to look like a person in moonlight, and coastal shrubs such as Chinese glossy privet and Eurya japonica. Although the mountain borders the city, a short walk into its rounded basin is enough to leave the traffic noise behind.

What to see

• Jaesong Neodeol Trail: A path linking the nine boulder fields, with sea views between the rocks.
• Jangsan Falls (Yangun Falls): A waterfall on the stream, a natural rest stop on the loop trail.
• Silver grass fields: The ridge below the summit turns silver with eulalia in autumn.
• Daecheon Park: The usual starting point, where a flat park path gradually turns steep.
• Summit views: Haeundae Marine City, Gwangan Bridge and, on clear days, the open sea.

Good to know

• The name: "Jang" refers to a thorny wild peach; the mountain is said to have been covered with them.
• A military summit: The top borders a military installation, and part of the path follows a fence. Each October the traditional Jangsan mountain rite is held inside the summit army area, which is normally off limits.
• The Jangsan Beom: An internet legend tells of a white-furred creature that imitates human voices; it inspired a 2017 horror film.

Nearby

• Haeundae Beach and Dongbaekseom Island: Two subway stops from the trailhead.
• Dalmaji-gil: The hillside road from Haeundae towards Songjeong, part of Busan Galmaet-gil Route 2.

Tripto tips

• Getting there: Most hikers start from Jangsan Station on Busan Metro Line 2 and walk to Daecheon Park, which has a paid car park.
• Routes and time: The boulder-field loop (Bansong Library – Seonbawi Rock – silver grass field – Jangsan Falls – Daecheon Park – Jangsan Station) is about 15 km, around 4 hours. A summit round trip takes roughly 3–4 hours.
• Fees: Free, open all year.
• Gear: Boulders on the neodeol can shift, so wear ankle-supporting boots. Junctions are frequent; download an offline map.
• When to go: Autumn for the silver grass, clear winter mornings for the views.
• Linking walks: The boulder-field loop is part of Busan's nine-route Galmaet-gil network, so it combines well with a Haeundae coastal walk.