Niseko also has backcountry ski-courses that are unofficially on the maps. To the furthest right of Annupuri lies Sannozaka, an area prone to avalanche but with high quality snow. To the far right of Hirafu lies Higashi One, also prone to avalanche but with challenging backcountry terrain. Near the lower half of Hanazono is a forest route called Strawberry Fields, which is perhaps the most famous run in Niseko. Mount Yōtei is also a popular mountain for backcountry skiing expeditions.