🇯🇵 Japan: ultramarathons and ultra trails
8 races scheduled between October 2026 and September 2027. Every race lists dates, locations, distances and official links; the list is updated daily.
30OCT 26
TRAIL
Lake Biwa 100Ōtsu · Japan · in 10 days01NOV 26
TRAIL26K15K
Nakanoto Treasure TrailrunNakanoto · Japan · in 12 days20DEC 26
TRAIL50K23K
沖縄100KウルトラマラソンYonabaru · Japan · in 61 days10JAN 27
TRAIL55K26K
屋久島ウルトラecoマラニックYakushima · Japan · in 82 daysAPR 27
TRAIL70K39K
Monte Fuji 100Yamanashi · JapanJUN 27
TRAIL
Nagi Peaks Tough Trail ChallengeOkayama · JapanJUN 27
TRAIL57K21K
Kaga Spa Trail Endurance 100 Japan by UTMB®Kaga · JapanSEPT 27
TRAIL29K12K6K
Fuji Trail ChallengeTokyo · Japan