The Byeoldobong Sanchaekro is a hiking course in Jeju that follows Jeju Olle Trail Course 18 next to Sarabong Park in Jeju City. The path is gentle and well paved, and it looks out over the sea off Jeju and Hallasan, with the red sunset known as Sabong Nakjo visible as well. It connects to Sarabong and takes about 30 minutes to walk one loop, and streetlights come on in the evening. The staircase section leading to the top can leave you short of breath if you do not exercise regularly.