Brazos Bend 100

Event overview

Brazos Bend 100 takes place December 6-7, 2025 at Brazos Bend State Park in Needville, TX (21901 Farm to Market Rd 762). The event features multiple distances:

• 100M
• 100K
• Marathon (26.2M)
• Half Marathon (13.1M)
• Brazos Kids Kilometer
• Ultra Pacer

The 100-mile distance is an official Western States Endurance Run qualifier; finishers within 32 hours earn eligibility for the WSER lottery. Cash prizes are offered for the 100M overall top three (male and female): $800, $400, and $200. Finishers receive event-specific awards: buckles for the 100M and 100K, medals for marathon and half marathon.

Course, support and rules

The course is a roughly 16.7-mile loop on mostly flat crushed gravel, hiking and horse trails; the course is described as 99.9% flat with a single 10-foot rise. Brazos Bend will operate four staffed aid stations on the course plus unmanned water for shorter events. All runners must carry their own hydration device; aid stations will not provide cups. Aid station supplies are for registered runners and pacers only.

Pacing and crew rules: 100M runners may have one pacer on the final two loops; 100K runners may have one pacer on the final loop. No pacers are allowed in the marathon or half marathon. Park pass and camping rules apply; special event park passes are required for individuals 13 and older and annual park passes are not accepted for event attendees. Cutoff limits are set per distance (for example, 100M - 32 hours). Visit the organization's website for the most recent information.