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    • 100K ultra marathons in Japan

    Japan
    100K

    Filters

    10 races

    Okushinano 100 Trail Running Race

    Okushinano 100 Trail Running Race

    Jun 7, 2025 (Sat)

    Okushinano mountain cottage, Nagano, Japan

    50K
    100K
    Aizu Bandai Mountain Ultra Marathon

    Aizu Bandai Mountain Ultra Marathon

    Jun 8, 2025 (Sun)

    Minami-sanriku Town General Gymnasium Bayside Arena, Miyagi, Japan

    65K
    100K
    Shimanami Surround

    Shimanami Surround

    Jun 15, 2025 (Sun)

    Hiroshima, Hiroshima, Japan

    60K
    100K
    Lake Saroma 50/100K Ultramarathon

    Lake Saroma 50/100K Ultramarathon

    Jun 29, 2025 (Sun)

    Yubetsu, Hokkaido, Japan

    50K
    100K
    Shiga Kogen 100

    Shiga Kogen 100

    Jul 4, 2025 (Fri)

    Yamanochi, Nagano, Japan

    100K
    Chiba Ultra Marathon

    Chiba Ultra Marathon

    Aug 2, 2025 (Sat)

    Mihama Ward, Chiba, Japan

    50K
    100K
    San'in Kaigan UNESCO Global Geopark Tango 100K UltraMarathon

    San'in Kaigan UNESCO Global Geopark Tango 100K UltraMarathon

    Sep 14, 2025 (Sun)

    Kyotango, Kyoto, Japan

    60K
    100K
    Challenge Fuji 5 Lakes

    Challenge Fuji 5 Lakes

    Apr 19, 2026 (Sun)

    Fujiyoshida, Yamanashi, Japan

    62K
    80K
    100K
    120K
    Yatsugatake Nobeyama Highland 100K Ultramarathon

    Yatsugatake Nobeyama Highland 100K Ultramarathon

    May 17, 2026 (Sun)

    Nanmoku, Gunma, Japan

    67K
    100K
    Hakusan-Shirakawago Ultramarathon

    Hakusan-Shirakawago Ultramarathon

    Sep 13, 2026 (Sun)

    Hakusan, Ishikawa, Japan

    100K

    Showing 1 - 10 of 10 events