Mamba 100 2026

Half of each 14.30-mile loop follows the Wolf River, with all Mamba 100 distances using this same flat, mostly single-track trail circuit. The race weekend focuses on Saturday evening: all distances must conclude by 5:00 pm, featuring cutoffs of 34 hours for the 100-miler, 22 hours for the 100K, 10 hours for the 50K, and 8 hours for the 25K. The 100-miler consists of seven loops, the 100K uses four loops with a shortened initial loop, the 50K covers two loops, and the 25K is a single loop. The low-elevation course is suitable for runners aiming for a 100-mile personal record or a sub-24-hour finish. This format also accommodates individuals running their first 100-miler or any race distance for the first time. Buckles or medals are awarded only to finishers who meet the Saturday cutoff. Additionally, the event includes a Thursday pre-race dinner, along with cash and raffle prizes for participants.