Visit Jeju describes Route 21 as an 11.1 km walk from near the Jeju Haenyeo Museum in Hado-ri to Jongdalbada in Jongdal-ri, taking about 3–4 hours. The path crosses villages, fields and the coast, passing Byeolbangjin, the Tokkiseom area and Jimibong. Jimibong is relatively steep, but the tourism page describes an alternative route for people who prefer to avoid the climb. Follow current trail signs. The listing recommends bus 101 from Jeju or Seogwipo intercity bus terminal to the Sehwa transfer stop, followed by an approximately 11-minute walk to the pavilion at the museum. Bus routes, schedules and Olle diversions can change; confirm current transport and trail notices before leaving.