About This Race
The Viper 300 represents one of the most demanding multi-day ultramarathon challenges in the Southeast, offering distances from 25K to an extraordinary 300 miles. Set within Memphis's Shelby Farms Park, this race tests runners across a 33.4-mile loop course that weaves through diverse terrain including paved paths and single-track trails alongside serene lakes and wooded landscapes. The race schedule spans nearly a week, with the 300-mile distance requiring runners to complete nine loops over 137 hours. What sets the Viper 300 apart is its unique wildlife encounters—runners share the trail with deer and buffalo roaming the park grounds. The race offers multiple entry points throughout the week, from the flagship 300-mile event starting Monday morning to a Friday the 13th night 53K race and a Saturday 25K option. Each distance provides a different challenge level while maintaining the distinctive character of this Tennessee ultramarathon series.
The 33.4-mile loop course at Shelby Farms Park combines paved pathways with challenging single-track sections through varied terrain. Runners navigate around multiple lakes and through dense wooded areas, with the course designed to provide natural wildlife viewing opportunities including deer and buffalo. The loop format allows for strategic planning and crew support, with runners passing their vehicles twice per loop for gear changes and rest stops.
Aid Stations
3 stations along the course
Refuge Unmanned Water Station
water
Crew access only during daylight hours Monday-Thursday, 24-hour access Friday-Saturday
Tour de Wolf Pavilion (TDW) Aid Station
water, electrolyte, food
Sleep station with cots, pillow, and blanket. Runners pass this station twice per loop.
Hyde Lake Aid Station
water, electrolyte, food
Start/Finish location and sleep station with cots, pillow, and blanket
Notable Features
The Viper 300 stands out for its multi-day format spanning nearly a week, with races starting on different days allowing runners to choose their preferred challenge level. The unique wildlife encounters with deer and buffalo roaming freely through the course create an distinctive running experience. The loop format provides excellent crew access and strategic opportunities, while the variety of distances from 25K to 300 miles makes it accessible to different experience levels within the same event weekend.