In 21 days · Sat, Oct 10, 2026
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Saturday, October 10th, 2026
High Hope Ranch, Glen Rose TX
Ultra · 10K · 5K
63–83°F · low rain risk
See last 10 years
On this date: rain 3 of the last 10 years
2025
62–84°F
dry
2024
66–93°F
dry
2023
66–84°F
dry
2022
67–86°F
dry
2021
69–92°F
rain
2020
66–89°F
dry
2019
68–91°F
rain
2018
54–71°F
dry
2017
50–69°F
rain
2016
54–79°F
dry
Best months to race in Texas →
About this race
THE MAMMOTH TRAIL RUN
A Chronicle of Grit and Wonder!
Event Details
- Date: October 10, 2026
- Location: High Hope Ranch, 3353 County Road 2009, Glen Rose, Texas
- Race Distance Options: 100K, 50K, 25K, 10K, 5K, and Mighty Mammoth 1K Kids Dash
- Race URL: Register Here
Race Overview
- Trail Experience: The Mammoth Trail Run is set in a thousand acres of rugged Texas Hill Country.
- Course Challenge: Expect steep inclines and declines: trail shoes with heavy traction are advised.
- Gather the Herd: Join fellow trailblazers for an expedition that promises legendary tales.
- Choose Your Challenge: Select from a variety of paths tailored for different levels of grit.
Event Categories
- 100K Ultra: For the absolute boldest of the bunch! (26-hour cutoff)
- 50K | 25K | 10K | 5K: Rugged paths for every level of grit.
- The Mighty Mammoth 1K: A spirited, non-timed dash for the young 'uns!
The Bounty
- Finisher's Medal: Every pioneer earns a Finisher's Medal and an official race shirt.
- 100K Ultra Finishers: Receive a mighty heavy Finisher BUCKLE.
- Provisions: Plentiful provisions along the route to keep you fueled.
- Post-Race Hootenanny: Enjoy hearty grub, cold revitalizing tonics, and foot-stomping music!
Rules of the Trail
- No Pets: Pets must remain at home as per USATF decree.
- B.Y.O.B: This is a cupless expedition! Bring your own hydration vessels.
- Weather or Shine: The run continues rain or shine.
- No Age-Group Awards: Glory is the prize for conquering the elements.
Trail Boss Itinerary (Race Day)
- 06:00 AM: Gates open for Packet Pick-up
- 07:00 AM: 100K Stampede Begins
- 07:30 AM: 50K Start
- 11:00 AM: The Mighty Mammoth 1K Kids Race!
Camping Options
- Campsite Availability: Primitive camping and Boondocking sites are available for $10 per person.
- Capacity: Maximum 6 per site.
- Local Accommodations: Nearby guest houses and the Baymont Inn & Suites for comfortable stays.
Refunds and Transfers
- Entry Fees: Race Entry Fees are NON-REFUNDABLE.
- Transfers: Transfers to another person, category, or Mammoth event are allowed.
Course Maps
Viewable HERE
Join the Herd
Dust off your gear and register today to secure your place in the chronicle!
Course map
Hotels for race weekend
Live prices near the start line, Oct 9 – 11, 2026.
Train with a club
Run clubs near Glen Rose to train with before race day.
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