Hallasan National Park summit, there is a crater lake called “Baekrokdam.” Since the mountain has high altitude, there are a number of alpine plants and animals. 1800 kinds of plants, including 400 kinds of specimen plants and 50 kinds of special plants, are living in Hallasan. So the Jeju island is designated by Biosphere Reserve in 2002 and Hallasan National Park is one of the region of Jeju Bioshere. Hallasan National Park Hallasan National Park () is located in the province of Jeju-do, South Korea. It was designated as the 9th national park in 1970. It features the highest mountain in South Korea,
Hallasan from the sea is formed on the coastal area and the peak temperature is mainly observed during the daytime. The change of the minimum temperature varies depending on the degree of cooling of Hallasan and the intensity of the wind speed.When the wind blows due to the predominance of sea breeze, the air cooled in Hallasan descends to the coastal area and induces the decrease in temperature. When the synoptic wind blows strongly, the cold air of Hallasan moves to the downwind side and the lowest temperature appears. The lowest temperature in the downwind area is 2 ~ 5℃ lower