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    • 12hr ultra marathons

    12hr

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    283 races

    Wicked Worm

    Wicked Worm

    Jun 21, 2025 (Sat)

    Grand Rapids, Michigan, United States

    $92.81 - $115.32

    6h
    12h
    The Dizzy GOAT

    The Dizzy GOAT

    Jun 21, 2025 (Sat)

    Gretna, Nebraska, United States

    $112.26 - $146.6

    6h
    12h
    Red, White, and Brew

    Red, White, and Brew

    Jun 21, 2025 (Sat)

    Windsor, Colorado, United States

    50mi
    Backyard
    12h
    Sasquatch Ultra - 24hr

    Sasquatch Ultra - 24hr

    Jun 21, 2025 (Sat)

    Agassiz, British Columbia, Canada

    6h
    12h
    24h
    Saltire 24, 12 and 6

    Saltire 24, 12 and 6

    Jun 22, 2025 (Sun)

    Strachan, Scotland, United Kingdom

    6h
    12h
    24h
    Reckless Red Eye Endurance Run

    Reckless Red Eye Endurance Run

    Jun 22, 2025 (Sun)

    Springfield, New Jersey, United States

    6h
    12h
    Hawaii 1-20-12 Endurance Challenge

    Hawaii 1-20-12 Endurance Challenge

    Jun 22, 2025 (Sun)

    Keaau, Hawaii, United States

    $55 - $65

    36mi
    12h
    Utopia Backyard Ultra

    Utopia Backyard Ultra

    Jun 27-28, 2025 (Fri-Sat)

    Utopia, Ontario, Canada

    6h
    12h
    Brooksvale 12-Hour

    Brooksvale 12-Hour

    Jun 28, 2025 (Sat)

    Hamden, Connecticut, United States

    $110

    12h
    The Firefly Overnight Endurance Challenge & 10K Trail Race

    The Firefly Overnight Endurance Challenge & 10K Trail Race

    Jun 28, 2025 (Sat)

    Lewis Center, Ohio, United States

    12h
    Vulture Vista Ultra

    Vulture Vista Ultra

    Jun 28, 2025 (Sat)

    Greencastle, Indiana, United States

    6h
    12h
    Cacapon 12 Hour Challenge

    Cacapon 12 Hour Challenge

    Jun 28, 2025 (Sat)

    Berkeley Springs, West Virginia, United States

    $92.81

    12h
    Firefly Dusk to Dawn Trail Race

    Firefly Dusk to Dawn Trail Race

    Jun 28, 2025 (Sat)

    Lewis Center, Ohio, United States

    12h
    12h de Ceyzériat

    12h de Ceyzériat

    Jun 28, 2025 (Sat)

    Ceyzériat, Auvergne-Rhône-Alpes, France

    12h
    Run Under the Stars

    Run Under the Stars

    Jul 5, 2025 (Sat)

    Corydon, Indiana, United States

    6h
    12h
    ATW Odyssey 12hr Trail Run

    ATW Odyssey 12hr Trail Run

    Jul 5, 2025 (Sat)

    Eaton Ford, East of England, United Kingdom

    12h
    Notchview Ultra

    Notchview Ultra

    Jul 11-13, 2025 (Fri-Sun)

    Windsor, Massachusetts, United States

    2.7

    $82.18 - $237.8

    101mi
    6h
    12h
    24h
    48h
    72h
    Merrill's Mile

    Merrill's Mile

    Jul 11, 2025 (Fri)

    Dahlonega, Georgia, United States

    $82.18 - $259.1

    6h
    12h
    24h
    48h
    Mad Mallard 3, 6 and 12 HR NIGHT TIME Trail Race

    Mad Mallard 3, 6 and 12 HR NIGHT TIME Trail Race

    Jul 11, 2025 (Fri)

    Chapel Hill, Tennessee, United States

    6h
    12h
    24h
    Chase the Moon

    Chase the Moon

    Jul 11, 2025 (Fri)

    Highlands Ranch, Colorado, United States

    1.4

    $152.6 - $360.27

    50K
    6h
    12h
    Dirty Dozen Endurance Run

    Dirty Dozen Endurance Run

    Jul 12, 2025 (Sat)

    Pinole, California, United States

    6h
    12h
    Miola Madness - Hot Summer Nights

    Miola Madness - Hot Summer Nights

    Jul 12, 2025 (Sat)

    Paola, Kansas, United States

    $130.02 - $153.02

    6h
    9h
    12h
    Sombrero Sizzler

    Sombrero Sizzler

    Jul 12, 2025 (Sat)

    Jacksonville, Florida, United States

    $88.16 - $249.64

    6h
    9h
    12h
    Brave the 6 Hr and 12 Hr Ultra Relay Race

    Brave the 6 Hr and 12 Hr Ultra Relay Race

    Jul 12, 2025 (Sat)

    Atglen, Pennsylvania, United States

    6h
    12h
    Pinetum Mind Games Endurance Event

    Pinetum Mind Games Endurance Event

    Jul 18, 2025 (Fri)

    Dixon, Illinois, United States

    $50.31 - $147.27

    6h
    12h
    24h

    Showing 26 - 50 of 283 events