Hallasan and the volcanic core of Jeju
Published on 09/17/2026 at 10:19 | Editorial responsibility: Rafael Müller, Editor-in-Chief AD HOC NEWS
Hallasan rises from the centre of Jeju as a shield volcano and the highest mountain in South Korea, reaching 1,950 m (6,398 ft). Its broad volcanic mass gives Jeju its most direct landmark.
Jeju’s volcanic mountain in profile
Hallasan is a shield volcano made largely of basalt, with a summit crater lake called Baengnokdam. The mountain and its surroundings form Hallasan National Park, and the mountain’s name carries across the island’s identity.
The island is part of the Jeju Island Biosphere Reserve, and Mt Hallasan sits at its core. UNESCO describes Jeju as volcanic in origin and notes the island’s shield-volcano form at 1,950 m above sea level.
Hallasan in the island landscape
The mountain dominates the island’s interior rather than standing as a single peak set apart from it. Its slopes and summit area belong to a volcanic terrain that includes basalt flows and a crater lake.
Hallasan also appears in the history of Jeju as a named natural landmark rather than an urban monument. The mountain’s Korean name, ???, is widely attached to the island itself, and the two are often spoken of together.
Hallasan’s summit, slopes and volcanic form
At the top, Baengnokdam sits in the summit crater, a visible reminder of the volcano beneath the mountain’s profile. The mountain rises from a volcanic island landscape that was shaped by repeated lava flows and summit activity over a long geological span.
Hallasan is part of a wider protected landscape that includes the island’s biosphere reserve core and the national park around the mountain. The combination of summit crater, basalt body and island setting gives it a clear geological identity.
Visiting Hallasan: what travellers from Western Europe should know
- Hallasan rises on Jeju in South Korea, and the mountain sits at the island’s centre. The English-language tourism listings identify Jeju-si as the nearest urban reference point.
- The mountain is volcanic terrain, with basalt slopes and a crater lake at the summit. Hallasan’s height is 1,950 m (6,398 ft), so altitude is part of its character.
- Hallasan National Park is the named protected area around the mountain. The national-park setting and the biosphere-reserve core mark it out as a formal landscape designation.
- The official language is Korean and the currency is the South Korean won.
- Entry requirements depend on your nationality; UK travellers can check the FCDO travel advice at gov.uk/foreign-travel-advice, Irish travellers the Department of Foreign Affairs at ireland.ie.
Searching for Hallasan on social platforms
These links open searches for Hallasan on each platform.
Frequently asked questions about Hallasan
Where is Hallasan?
Hallasan stands on Jeju, the large volcanic island off the southern coast of the Korean Peninsula. It is the island’s central mountain and South Korea’s highest peak.
What does a visit involve?
Hallasan is a high volcanic mountain with basalt slopes and a summit crater lake. The terrain reflects its height and geological origin rather than an urban park setting.
What makes Hallasan distinctive?
Its scale, volcanic form and protected status define it. The mountain is part of Hallasan National Park and the Jeju Island Biosphere Reserve core.
