Grasslands Trail Run

Alvord, United States • 21-22 Mar 2026

Grasslands Trail Run

The Grasslands Trail Run takes place in the Lyndon B. Johnson National Grasslands, a U.S. Forest Service area of more than 20,000 acres north of Fort Worth and near Decatur and Alvord, Texas. Trails loop among rolling hills and pass through a mix of pine and oak groves, open fields, and areas with livestock. Courses start and finish at TADRA Point Trailhead and are run on equestrian trails.

Distances offered include:

  • 100 mile
  • 50 mile
  • Marathon
  • Half Marathon
  • 15K (Sunday)

Course layout uses color coded loops: the half marathon follows the blue trail; the marathon uses the white and blue trails; the 50 mile and 100 mile use the blue, white, yellow and red trails; the 15K uses the yellow trail. The course map shows all loops and aid station locations. The 100 mile distance has about 4,000 feet of elevation gain and is described as non-technical. The 100 mile cut-off is 30 hours. The 15K has a 3.5 hour cut-off; other distances have generous cut-offs.

Runners receive a race shirt and distance specific finish awards. Finishers in the 100 mile earn a sub-20, sub-24 or Finisher buckle; finishers in other distances receive medals. Volunteer work earns race credits. The event has a credit based refund policy with tiers based on how far in advance a cancellation is made. Visit the organization's website for the most recent information.

Race information

100 mi
100 Mile
50 mi
50 Mile
26 mi
Marathon
13 mi
1/2 Marathon
15 km
15k
Visit the organization's website for the most recent information.
Trail runs nearby

North Texas Ultra runs multiple distances on the Lost Creek Reservoir State Trailway in Fort Richardson State Park, using a 15.5 mile out and back loop on soft fine gravel with staffed aid stations and mandatory water carrying.