The Mammoth - Glen Rose
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The Mammoth Trail Run - Glen Rose, TX
The Mammoth Trail Run takes place on October 10, 2026 at High Hope Ranch in Glen Rose, Texas. The event uses trails across ranch terrain with sections that include steep inclines and declines; trail shoes with heavy traction are advised.
Distances offered include:
- 100K (26-hour cutoff)
- 50K
- 25K
- 10K
- 5K
- Mighty Mammoth 1K non-timed kids dash
Finishers receive an official race shirt and a finisher medal; 100K finishers also receive a finisher buckle. Plentiful on-course provisions are provided for participants. The event is cupless; participants must bring their own hydration vessels. Pets are not permitted. The event runs rain or shine and does not award age-group prizes.
On-site primitive camping and boondocking are available on the property for a per-person fee, with a maximum number of people per site. Local guest houses and the Baymont Inn & Suites in town are listed as nearby lodging options. Race entry fees are non-refundable but transfers to another person, category, or Mammoth event are allowed. Route maps and GPX files are provided for navigation, and a participant guide is to be published. Visit the organization's website for the most recent information.
