September ultramarathons in Texas, United States

Single track trails, ranch roads, field crossings, and water crossings on a 2800-acre working cattle ranch in the Texas Hill Country

Technical Camp Eagle trails, rugged terrain, scenic 1400-acre venue, multi-day trail sports festival with running, rucking, and mountain biking options

Private ranch route with extremely steep hills, significant elevation changes, and closely spaced aid stations for early September heat

Trail running weekend at Camp Buckner in the Texas Hill Country, with purpose-built routes, rolling countryside, and a family-friendly camp atmosphere

Steep 20% grade ascent on Monkey Butt Hill, 100-foot climb in a tenth of a mile, Cross Timbers Hiking Trail, limited to 80 participants

Mostly flat and fast out-and-back route on the NETT Trail, mixed terrain with bridge crossings, starting and finishing at Paris's Eiffel Tower.

Challenging, dirty and rocky single and wide track trails with 1400 feet of elevation gain per 15-mile loop at Flat Creek Crossing Ranch near Austin, Texas

Flat, fast course on the NETT Trail with asphalt, gravel, soft ground, scenic bridge crossings, and starts and finishes at Paris, Texas' Eiffel Tower

Rocky trails and rugged hills in South Llano River State Park, dry southern climate, night race beneath a starlit sky

Rugged 50k trail run through the Davis Mountains with technical switchbacks, ridgetop views, rim traverses, and a long, gradual descent to the finish

Single-track trails through East Texas pine forest, rolling hills, technical terrain, and humid conditions within Tyler State Park

Challenging trail run through Palo Duro Canyon with steep elevation changes, vibrant rock formations, and varied surfaces of sand, clay, and sandstone.