The North Texas Ultra is a 10K, 25K, 50K, 52 Miler, and 100K run held on Fort Richardson State Park's Trailway in the foothills of North Texas. Featuring an open, scenic, historical, and paved with soft fine gravel. The race follows a 15.5-mile out & back course beginning and ending at the North Park Unit. This is one of the fastest ultra marathon courses in Texas!