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  • Distance: 4.5 km from Durango
    Sat, Sep 12, 2026 at 8:30 AM

    Come race with us at beautiful Lake Nighthorse in Durango, Colorado. The Swim takes place in this gorgeous lake. The Bike course includes some challenging climbs, while the Run course is rolling on mostly natural dirt/gravel surface with spectacular views of the lake. The Olympic course is two laps of the Sprint course for all disciplines.

    16 Miles51.5kGravelOlympicRunSprintSwimTriathlon via RunSignup
  • 111 South Camino Del Rio, Durango, Colorado, 81301, United States
    OpenStreetMap Google Maps
    Distance: 3.4 km from Durango
    Sun, Oct 11, 2026 at 8:00 AM

    The inaugural Durango Marathon & Half Marathon debuts on October 11, 2026, and you are invited to experience one of Colorado’s most beautiful mountain towns at the height of fall. Set against crisp high-country air and peak autumn foliage, this road race showcases scenic paved routes winding through and around Durango, with a start and finish near historic downtown and the iconic Durango & Silverton Narrow Gauge Railroad Station. Whether you’re tackling the full 26.2 or the half marathon, you’ll be treated to expansive views, quiet roads, and a course designed for rhythm, scenery, and celebration.

    Built as a true destination race, the Durango Marathon combines professional race operations with small-town hospitality. Expect fully supported aid stations, accurate timing, high-quality finisher medals and shirts, and a welcoming finish-line atmosphere with music, awards, and local flavor. Most of the course runs on wide road shoulders with minimal closures, keeping the experience safe, smooth, and community-friendly while highlighting the landscapes that make Durango special.

    More than a race, the Durango Marathon is a weekend experience. October is one of the best times to explore the region—perfect for extending your stay with family or friends to enjoy fall hiking, local breweries, vibrant restaurants, and downtown shopping. We can’t wait to welcome you to Durango for a new tradition rooted in endurance, community, and the unforgettable beauty of fall in the San Juan Mountains.

    See full details
    13.1 Miles26.2 MilesMarathonRun via RunSignup
  • Distance: 205 m from Durango
    at 11:00 PM

    World's Best Running Series!

    No Time Limits

    Great Food

    Award-Winning Medals

    Loony Running Family!

    We RUN this country, TOGETHER!

    Event details and schedule

    Thanks for running with Mainly Marathons! Take a look at our website for additional details about this series and our other series of races.

    Also, join our Facebook group to stay up-to-date with our loony adventures: Main Group and Southwest Series.

    If you're interested in some Mainly Merch, check out our online store HERE. We'll offer some items (hats, stickers, magnets, mugs, etc.) in-person at the races, the Mainly Merch store best option for a variety of fun designs and quality merchandise to showcase your loonacy!

    If you have any questions, email [email protected]

    We RUN this country, TOGETHER!

    See full details
    Run via Active.com
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