Brazos Bend 100

Brazos Bend 100 is a flat trail race held at Brazos Bend State Park in Needville, Texas, south of Houston. It takes place on the first Saturday in December. The primary event is the 100-mile race, with additional distances including 100K, a marathon, a half marathon, a kids kilometer, and ultra pacer events. The 100-mile race serves as a Western States 100 lottery qualifier for finishers under 32 hours, attracting ultrarunners seeking that entry. The course consists of repeated loops of approximately 16.7 miles. The terrain features crushed rock, shaded hiking trails, and smooth horse paths. It is nearly entirely flat, with a single 10-foot rise over a tenth of a mile. This configuration positions Brazos Bend as one of the nation's fastest trail ultras. Many participants opt for road shoes, unless rain makes the surface muddy. Trail Racing Over Texas organizes the event, emphasizing aid station support. The race typically draws between 500 and 1,000 runners across all distances.