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Brazos Bend 100
Race Details:
- Location: Needville, TX, United States
- Race Date: 12/05/2026
- Race Distances: 100 Kilometer, 100 Mile, Full Marathon, Half Marathon, Ultra Marathon
What This Race Counts Toward:
Boston: No
Western States 100: Yes
UTMB Index: Yes
Brazos Bend 100 Description
Brazos Bend 100 takes place each December at Brazos Bend State Park south of Houston, Texas, on a nearly flat 16.7-mile loop through pine forest and around the park’s lake system. Runners can enter the 100-mile, 100K, marathon, or half marathon distance, with the ultra options serving as a Western States 100 qualifier and a UTMB Index race. With well-stocked aid stations every few miles and a supportive small-race atmosphere, it’s a popular entry point for first-time 100-mile finishers chasing a fast, low-elevation course.
Always check the official race website for the most accurate and up-to-date race information and logistics.
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Brazos Bend 100 Additional Details:
Because the loop repeats throughout the night, runners see the same aid stations and crew access points over and over, making it easy for pacers and family to track progress without long drives between checkpoints. The flat, sandy trail through Brazos Bend’s bottomland forest stays shaded for much of the day, though Texas humidity and the park’s resident alligator population (visible from a respectful distance along the lake) add to the atmosphere. December temperatures swing from cool mornings into comfortable afternoons, making it one of the more forgiving times of year to attempt 100 miles in Texas. A relaxed, camp-like base area with fire pits and a steady rotation of familiar faces each lap gives the race a community feel that keeps runners coming back year after year.
Course Information
Profile: Very Flat
Type: Multiple Loops
Surface: Trails
Pace Groups: No
Time Limit: 32 hr (100M), 31.5 hr (100K), 31 hr (Marathon), 30.5 hr (Half)
# of Finishers
Half Marathon: Unknown
Marathon: Unknown
100K: 134 finishers (2025)
100 Mile: 133 finishers (2025)
Elevation Details
Elevation Gain: 600 ft (100M)
Elevation Loss: 600 ft (100M)
Average Temperature
- Low: 44°F
- High: 64°F
Train Smarter for Race Day
A great race starts long before the starting line. Whether you’re chasing your first finish or hunting a new PR, a structured training plan takes the guesswork out of race prep — building your fitness, your confidence, and your mileage at the right pace for you.
Explore plans for every distance and experience level, from your first 5K to your next ultra.
Your bridge into marathons, with a plan built for stepping up the distance.
Beginner, intermediate, and advanced plans to get you to the start line ready.
Plans for every ultra distance, from your first one to your longest day yet.
Structured plans for every experience level, first finish to chasing a new PR.
Things to Do in Needville, TX, United States
Make the most of race weekend — here’s how to fill the time before and after you cross the finish line.
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Hotels & Lodging Near the Brazos Bend 100
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Boston Qualifier: Yes
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