Oak Ass 100 Endurance Race 2026

The Oak Ass 100 is a November mountain bike endurance race held in Oak Mountain State Park, Pelham, Alabama. The 100-mile event consists of two laps on a 50-mile trail loop, with aid provided at the midpoint and conclusion of each lap. This race serves as the championship for the National Ultra Endurance Series. The course utilizes Oak Mountain’s trail system, incorporating double track and road sections only for passing. Riders will encounter extensive singletrack, climbing, and technical mountain biking challenges, distinct from a gravel race. The rider limit is 400, with prize money awarded to the top five men and women in both the 100-mile and 50-mile categories. The start/finish area offers amenities including showers, restrooms, and a bike wash station.