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    12hr ultramarathons in North Dakota, United States

    United States
    12hr
    North Dakota

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    2 races

    END-TRAILS 12-hour and 6-Hour Trail Run

    END-TRAILS 12-hour and 6-Hour Trail Run

    Oct 25, 2026 (Sun)

    Arvilla, North Dakota, United States

    Winding forest single track, flat double track, gentle North Dakota hills, 6- and 12-hour timed laps at Turtle River State Park

    6h
    12h
    24h
    Extreme North Dakota Trail Run Amongst Innumerable Lost Souls

    Extreme North Dakota Trail Run Amongst Innumerable Lost Souls

    Oct 25, 2026 (Sun)

    Arvilla, North Dakota, United States

    6h
    12h
    24h

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