Cheona Sypgil is a forest trail in Haean-dong, Jeju. The route runs about 9 km from Cheona Sypgil to Doloreum, passing through dense cedar and Sasa bamboo forest along Cheonagye Valley. The walk to Eoseungsaengak takes 2 hours 30 minutes to 3 hours, and a forest road appears after the steep slope at the entrance. There are almost no proper chairs or rest areas.