Grasslands Trail Run

MAR
20-21
2027
An annual trail running weekend in March at the LBJ National Grasslands near Decatur, Texas, offering 100 mile, 50 mile, marathon, half marathon and 15K options across rolling hills, forests, and open fields.
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 on the third weekend of March at the Lyndon B. Johnson National Grasslands near Decatur, Texas. The grasslands encompass more than 20,000 acres managed by the U.S. Forest Service north of Fort Worth. Trails loop among rolling hills and pass through pine and oak groves, open fields, and areas used for livestock.

Race distances offered include:

  • 100 Mile
  • 50 Mile
  • Marathon
  • Half Marathon (Saturday start)
  • 15K (Sunday)

The event traces its history back to 1999. Courses are multiuse and runners share the trails with horses and may pass livestock on route. The terrain includes a mix of forested sections and open country, with repeated loops on marked trails. Event information mentions multiple race formats across a weekend, including ultramarathon and shorter trail distances, allowing participants to choose from several established distance options. Visit the organization's website for the most recent information.

100 mi
100 Mile
50 mi
50 Mile
26 mi
Marathon
13 mi
Half Marathon
15 km
Sunday 15k
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