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    Winter ultramarathons in Illinois, United States

    Winter
    United States
    Illinois

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    3 races

    Arctic Frog Run

    Arctic Frog Run

    Dec 5, 2026 (Sat)

    Libertyville, Illinois, United States

    Picturesque course along Des Plaines River and Casey Trails with pavement, wooded paths, crushed limestone, and rolling hills; potential winter conditions

    50K
    Frozen Gnome

    Frozen Gnome

    Jan 9, 2027 (Sat)

    Crystal Lake, Illinois, United States

    Triple black diamond 50K ultramarathon on single-track trails through Veteran Acres and Sterne’s Woods, featuring a rugged winter landscape

    50K
    Winter Challenge Cross Country

    Winter Challenge Cross Country

    Jan 10, 2027 (Sun)

    Chicago, Illinois, United States

    Cross country trails winding through Caldwell Woods and Bunker Hill, 5 km loops on grassy or paved terrain, ultra and team options, winter forest setting

    6h

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