Ultra-Trail Mt. Fuji is a 165km ultra marathon in Kawaguchiko, Japan. Distance: 165km. Elevation: 7,600m D+. Difficulty: brutal (Challenge Rating 58/100). DNF rate: 30%. Time limit: 46h. Surface: trail. Established 2012.
Ultra-Trail Mt. Fuji
Kawaguchiko, Yamanashi, Japan
"165km around the sacred peak. A circumnavigation of Mount Fuji through ancient forests and volcanic terrain."
Asia's premier mountain ultra — a full loop around Mount Fuji through forests, volcanic ridges, and Japanese mountain culture.
The Course
A circumnavigation of Mount Fuji through the forests, ridgelines, and trails of the Fuji Five Lakes region. The course passes through ancient cedar forests, volcanic terrain, and offers stunning views of Japan's iconic mountain. Technical singletrack mixed with forest roads.
mountainous
loop
14
1,800m
6
Runner Experience
UTMB-standard aid stations with hot food, drinks, medical support, and drop bag access at major checkpoints.
A legendary finish line atmosphere. Ultra-Trail Mt. Fuji is a bucket-list race with celebrations that match its reputation.
Race Day Weather
10°C
065%
40%
Spring weather around Mount Fuji — variable and often wet. Night temperatures drop sharply at altitude. Rain is common.
Stats & Records
2012
1,100
32:00:00
18:58:25
Sébastien Chaigneau (2014)
22:30:00
Andrea Huser (2017)
Entry
¥38,000
November
instant
Lore & Trivia
UTMF (Ultra-Trail Mt. Fuji) is the 100-mile variant of the Fuji circumnavigation — a full loop around Japan's sacred volcano. While the shorter UTMF/KAI courses stay closer to the tourist zones, the 100-mile course pushes into the deeper forests of the Fuji volcanic zone, where the trails are technical, the forest is dense, and the mountain's spiritual presence is overwhelming. Japanese ultra running culture brings a unique sensibility to the race: meticulous organisation, deep respect for the mountain, and an emotional intensity that culminates in the finish at Kawaguchiko, where Fuji dominates the skyline.
- ▸ 100 miles (165km) circumnavigating Mount Fuji.
- ▸ Full volcanic terrain: pumice, lava rock, dense forest.
- ▸ Part of the UTMB World Series.
- ▸ Japanese organisation is meticulous — every detail is considered.
- ▸ The Aokigahara forest section is dense and mysterious.
- ▸ Kawaguchiko finish with Fuji as backdrop.
- ▸ Spring timing may coincide with cherry blossom season.
One hundred miles around a volcano. The mountain watches you the entire time.
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Frequently Asked Questions
How long is Ultra-Trail Mt. Fuji? +
Ultra-Trail Mt. Fuji is a 165km (165km) ultra marathon with 7,600m of elevation gain. The course is loop on trail terrain.
How hard is Ultra-Trail Mt. Fuji? +
Ultra-Trail Mt. Fuji is rated brutal with a Challenge Rating of 58/100 (Challenging). The DNF rate is 30%. Runners have 46 hours to finish.
How do I enter Ultra-Trail Mt. Fuji? +
ITRA performance index or completion of qualifying races.. Entry is by lottery. Entry costs ¥38,000. with a maximum of 1500 starters.
What is the weather like at Ultra-Trail Mt. Fuji? +
Average temperature is 10°C with 65% humidity and a 40% chance of rain. Spring weather around Mount Fuji — variable and often wet. Night temperatures drop sharply at altitude. Rain is common.
Are crew and pacers allowed at Ultra-Trail Mt. Fuji? +
No crew access is permitted. Pacers are not allowed. Mandatory gear is required.
What is the course record for Ultra-Trail Mt. Fuji? +
The men's course record is 18:58:25 set by Sébastien Chaigneau in 2014. The women's course record is 22:30:00 set by Andrea Huser in 2017.
What is the average finish time for Ultra-Trail Mt. Fuji? +
The average finish time is 32:00:00. About 1,100 runners finish each year. The DNF rate is 30%.
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