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    The Mammoth Glen Rose Classic 2026 - Glen Rose, TX - 100K - 50K - 25K - 10K - 5K and Mighty Mammoth 1K Fun Run

    October 10, 2026
    Glen Rose, Texas
    Rolling Course
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    Decision scores

    Six 0–100 scores telling you, at a glance, who this race is for.

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    Best for

    Family-friendly
    Big local vibe
    Charity race
    Trail / hill challenge

    About the Race

    Get ready for The Mammoth Race Glen Rose FALL migration. This multi-distance trail run welcomes families and runners of all skill levels. Enjoy the Hill Country that surrounds this stunning ONE THOUSAND acre ranch. We can't wait to see you out there! The Mammoth - Glen Rose, TX is a multi-distance trail running event located on the trails High Hope Ranch and Eco-Retreat. Distances offered are 100K, 50K, 25K, 10K, 5K and The Mighty Mammoth 1K FUN RUN. There will be two sections of the course: ...

    Course Profile

    Course profile data unavailable for this race.

    Course features

    Terrain
    trail
    Surface
    Trail
    Elevation gain
    Not measured
    Course type
    Not stated
    Field size
    Unknown
    Boston qualifier
    No
    Course map
    Not yet published
    Elevation profile
    Not measured

    Accessibility & inclusion

    Walker-friendly
    No
    Stroller-friendly
    No
    Dog-friendly
    No
    Kids race
    Yes

    Vibe & community

    charity
    Charity race.

    History & past results

    Years running
    Unknown — claim to add
    Recurrence
    Annual (assumed)

    Past finisher times and year-over-year participation will appear here once the organizer publishes them.

    Reviews

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    Common questions

    How hard is the The Mammoth Glen Rose Classic 2026 - Glen Rose, TX - 100K - 50K - 25K - 10K - 5K and Mighty Mammoth 1K Fun Run Ultra?

    We don't have a verified elevation profile yet — check the organizer's course map for the climb breakdown.

    What should I wear?

    Dress for ~10°F warmer than the standing temperature once you start running. Throwaway long-sleeve at the start, gloves and a hat for sub-50°F mornings, singlet plus visor when it climbs above 60°F. The race-day forecast above is the source of truth closer to the date.

    When does it sell out?

    No published deadline. Most races raise the entry fee in tiers and can sell out without warning — sign up early if you're committed.

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