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    100K ultramarathons in Oregon, United States in 2026

    2026
    United States
    100K
    Oregon

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    2 races

    Siskiyou Out Back

    Siskiyou Out Back

    Jul 11-12, 2026 (Sat-Sun)

    Ashland, Oregon, United States

    Challenging 100k course on the Pacific Crest Trail through Siskiyou Mountains, with Mt. Shasta and Cascades vistas highlighting Ashland's terrain

    50K
    100K
    Waldo 100K

    Waldo 100K

    Aug 1, 2026 (Sat)

    Oakridge, Oregon, United States

    Mountain single-track circuit with over 11,000 feet of climbing, three major ascents, isolated second half, summit at Maiden Peak, minimal road access

    100K

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    Showing 1 - 2 of 2 events