Brazos Bend 100

Needville, United States • 6-7 Dec 2025

The Brazos Bend 100 is a premier trail running event held annually in December at Brazos Bend State Park, just south of Houston, Texas. It features multiple race distances including 100 miles, 100 kilometers, marathon, half marathon, and a women's sub-ultra half marathon. Known as one of the fastest trail races in the country, the course is nearly flat (99.9%) with a single 10-foot hill, running on a mix of crushed rock, soft hiking trails, and smooth horse trails. The race offers four fully stocked aid stations and is a Western States Endurance Run qualifier for sub-30-hour 100-mile finishers. The scenic park is famous for its wildlife, including American alligators, which runners may see from a safe distance. Visit the organization's website for the most recent information.

Race information

UTMB 20K UTMB 100K
100 mi
10 m+
100 Mile
100 km
100 Kilometer
26 mi
Marathon
13 mi
Half Marathon
Visit the organization's website for the most recent information.
Trail runs nearby