Grasslands Trail Run

MAR
20-21
2027
A multi-distance trail event each March at LBJ National Grasslands near Decatur TX, featuring unique looped trails, aid stations, finisher medals and 100 Mile buckles.
20-21 Mar 2027
100 miles 50 miles 26 miles 13 miles 15 kilometers

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Grasslands Trail Run

The Grasslands Trail Run is an annual trail running event held since 1999 on the third weekend in March at the Lyndon B. Johnson National Grasslands near Decatur, Texas. The race takes place on more than 20,000 acres managed by the U.S. Forest Service and uses a mix of single-track and equestrian trails that loop among rolling hills, pine and oak groves, and open grassland fields.

Distances offered include:

  • 100 Mile
  • 50 Mile
  • Marathon
  • Half Marathon
  • 15K

The course system includes approximately 45 miles of non-overlapping trail; the Marathon, Half Marathon, and 15K use completely unique trail sections. The 100 Mile course has around 4,000 feet of elevation gain and a generally gentle profile. Trails used are identified by color names such as Blue, White, Yellow, and Red.

This is a cupless race so runners must carry their own hydration device; aid stations provide water, electrolyte drink, a variety of food items, SaltStick, ginger candies, first aid supplies, and feminine products. Night aid stations include hot food and some vegan options. Finishers receive distance-specific medals, and 100 Mile finishers receive buckles including sub-20 and sub-24 distinctions.

Additional event details include rules to prevent littering, limitations on crew and outside aid, requirements to close cattle gates, procedures for drop bags, a pacer policy that allows pacers in the 100 Mile after mile 54.9 with prior registration, and camping options near the start area with basic facilities. Visit the organization's website for the most recent information.

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