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    100K August ultramarathons in Switzerland

    August
    Switzerland
    100K

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    2 races

    Swiss Alps 100

    Swiss Alps 100

    Aug 7-9, 2026 (Fri-Sun)

    Fiesch, Valais, Switzerland

    Alpine trail course featuring a 1,128-meter climb over 10.3 km and 14 switchbacks, surrounded by dramatic Swiss Alps vistas and challenging terrain

    50K
    100K
    102K
    160K
    161K
    RunThrough Trails Engelberg

    RunThrough Trails Engelberg

    Aug 22-23, 2026 (Sat-Sun)

    Engelberg, Obwalden, Switzerland

    Alpine routes ranging from 25K to 100K, demanding elevation, pristine mountain trails, FĂĽrenalp valley crossings, Brunni finishes

    56K
    58K
    100K

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