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Big Tex Backyard Ultra

San Felipe, United States • 18 Oct 2025

The Big Tex Backyard Ultra is a unique running event held at Stephen F. Austin State Park in San Felipe, Texas. This "last runner standing" format challenges participants to complete a 4.17-mile loop every hour until only one runner remains.

The event includes a fully stocked aid station and offers participants a chance to earn a 100-mile buckle for completing 24 laps. All runners receive a hoodie and a customized poster of their achievements. The race is part of a series leading to national championships and world competitions, making it a significant event for ultra runners. Visit the organization's website for the most recent information.

United States Texas San Felipe

Race information

Website Registration
4 mi
Last Runner Standing
Visit the organization's website for the most recent information.
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