The Mammoth - Glen Rose

The Mammoth Trail Run - Glen Rose

The Mammoth Trail Run takes place on October 10, 2026 at High Hope Ranch, 3353 County Road 2009, Glen Rose, Texas. It is a trail running event held on rugged ranch land in the Texas Hill Country.

Available race distances include:

• 100K (26-hour cutoff)
• 50K
• 25K
• 10K
• 5K
• The Mighty Mammoth 1K, a non-timed kids dash

The course includes sections with steep inclines and declines. Trail shoes with strong traction are recommended. Aid stations and provisions are available along the route.

Finishers receive an official race shirt and a finisher medal; 100K finishers receive a finisher buckle. A post-race gathering includes food, cold drinks, and music.

Event rules specify no dogs on site, a cupless policy so participants must bring their own hydration vessels, and that the event proceeds rain or shine. There are no age-group awards.

Primitive camping and boondocking sites are available on the property for a fee of $10 per person, with up to six people per site. Local guest houses and a Baymont Inn & Suites in town are listed as lodging options. Entry fees are non-refundable, though transfers to another person, category, or Mammoth event are allowed.

Maps, GPX files, and a participant trail guide are provided for the course. Visit the organization's website for the most recent information.

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