Mamba 100 - Memphis, TN
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Event Overview
The Mamba 100 takes place at the Wolf River Refuge Trailhead in Memphis, Tennessee. The event utilizes the Wolf River singletrack trails, which are characterized as flat, fast, and smooth dirt paths with minor elevation changes. The course is designed around a 14-mile loop, and participants begin each distance with a specific lead-in section before entering the main loop system.
Participants can choose from four distinct distances:
- 100 Miler: Consists of a 2-mile start section followed by 7 loops. This distance is an official Western States Qualifying Race for participants who finish within the 34-hour cutoff.
- 100K: Includes a 6-mile start section followed by 4 loops.
- 50K: Features a 3-mile start section followed by 2 loops.
- 25K: Comprises a 1.5-mile start section followed by 1 loop.
Facilities and Support
The course features two primary aid station locations: the Bridge Aid Station, accessed twice per loop, and the Start/Finish Aid Station. Stations provide water, hydration drinks, and a variety of sweet and salty foods, with hot meals served during evening and overnight hours. The Start/Finish area acts as a central hub where runners in longer distances can access crew, drop bags, and personal canopy tents.
Awards and Regulations
Finishers of the 100 Miler and 100K earn custom buckles, with specific designs for sub-20 and sub-24 hour finishes in the 100-mile category. Participants in the 50K and 25K receive finisher medals. Top three male and female finishers in every distance are recognized with awards.
The event follows standard ultramarathon rules, including a prohibition on muling and distance dropping during the race. Pacers are permitted only for the 100 Miler (starting at loop 4) and 100K (starting at loop 3). The race is Trail Sisters Approved, offering specific deferral policies for pregnancy and postpartum recovery, as well as providing menstrual products at aid stations. Visit the organization's website for the most recent information.
