Outlast San Antonio

Outlast San Antonio takes place on December 12, 2026 in San Antonio, Texas. The event is a 6 Hour Challenge on trail starting at 7:00 a.m., a timed format in which you cover as much ground as you can inside the window; the listed distance is around 18 miles (29 km), which is the ballpark for a solid day out.

Timed races reward patience far more than speed. The standard approach is to start slower than feels necessary, walk the climbs from the first hour rather than the fourth, and eat and drink on a schedule instead of waiting until you feel empty. If you are stepping up from the marathon, a build with back-to-back long runs on trail prepares you better than extra weekday mileage.