Hoedong Reservoir in Busan has a trail around the reservoir for walking and hiking in the city center. The Galmaetgil Course 8-1 passes through it, and the roughly 17 km loop has clean air. From Buoengsan, the ridge of Ttangmoe-san and the reservoir's waterway look like a map of Korea. The road toward Gaejwa carries heavy truck traffic, so take care when approaching.