Ultra-Trail Mt. Fuji

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The Mt. Fuji 100, formerly Ultra-Trail Mt. Fuji (ウルトラトレイル・マウントフジ, urutoratoreirumountofuji), is an annual ultramarathon sporting event in Yamanashi Prefecture and Shizuoka Prefecture, Japan, started in 2012.^[1] The name was changed for the 10th edition in 2024.^[2]

The total distance is 166.6 km with 7,038 m of cumulative altitude gain,^[3] and the time limit is 44.5 hours.^[4] It is a sister sport event of Ultra-Trail du Mont-Blanc^[5] and part of the World Trail Majors Race Series.^[6]

There are two categories of race under the banner of Mt. Fuji 100: "FUJI 100mi" (formerly Ultra-Trail Mt. Fuji), is the full course around Mount Fuji, and the "KAI 70k", a 69.4 km race with 3,493 m of altitude gain.^[7]