Hallasan Crater | Jeju Island

Information

Landmark: Hallasan Crater
City: Jeju Island
Country: South Korea
Continent: Asia

Hallasan Crater, Jeju Island, South Korea, Asia

Hallasan Crater is the summit caldera of Hallasan Mountain, located on Jeju Island, South Korea. It is a volcanic crater lake situated at the highest point of the island.

Visual Characteristics

The crater lake, known as Baengnokdam, is approximately 600 meters in diameter and 100 meters deep. Its shape is roughly circular. The surrounding crater walls are composed of volcanic rock, primarily basalt. Vegetation density varies with elevation, with sparser alpine flora at the summit. Water color in the lake is typically a deep blue or green, depending on atmospheric conditions and depth.

Location & Access Logistics

Hallasan Crater is accessible via hiking trails on Hallasan Mountain. The most common access point is from the Seongpanak Trailhead, located approximately 25 kilometers southeast of Jeju City. The trailhead is reachable by car via National Road 1100. Public transport options include bus routes 181 and 182 from Jeju City to the Seongpanak bus stop, which is a short walk from the trailhead. Parking is available at the Seongpanak Visitor Center, with capacity for approximately 200 vehicles. The hike to the crater rim is approximately 9.6 kilometers one way, with an elevation gain of over 1,200 meters.

Historical & Ecological Origin

Hallasan Mountain is a shield volcano formed by repeated eruptions over an estimated 1.8 million years. The crater at its summit was formed by a caldera collapse following a large eruption. Hallasan is classified as a stratovolcano and is a UNESCO World Natural Heritage site, recognized for its unique volcanic landscape and biodiversity.

Key Highlights & Activities

Hiking to the summit and viewing the crater lake are the primary activities. The ascent involves traversing diverse ecological zones. Photography of the crater lake and surrounding volcanic features is common. Limited resting areas are available along the trails.

Infrastructure & Amenities

Restrooms are available at the Seongpanak Visitor Center and at designated points along the hiking trail, approximately every 2-3 kilometers. Shade is limited on the upper sections of the trail. Cell phone signal (4G/5G) is intermittent to non-existent on most of the hiking route, particularly at higher elevations. No food vendors are present on the trails or at the summit; visitors must carry their own provisions.

Best Time to Visit

The best months for hiking are typically from April to October, avoiding the winter months when snow and ice can make the trails hazardous. For photography, early morning or late afternoon light offers optimal illumination of the crater and surrounding landscape. High tide is not a relevant factor for this inland crater lake.

Facts & Legends

A local legend states that the crater lake was formed from the tears of Seolmundae Halmang, a giant goddess who created Jeju Island. A verified geological fact is that the crater lake is often dry during periods of drought, with its water level fluctuating significantly based on rainfall.