Viper 100
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Viper 100
Race weekend March 19–20, 2027 at Shelby Farms Park in Cordova / Memphis, TN. The event centers on a 33.4 mile loop that mixes smooth paved greenways and winding dirt trails, with final finishes at Hyde Lake. The course passes lakes, forests, and open parkland where runners may see local wildlife including deer and the park's buffalo.
Distances offered include:
- 100 Miler
- 107K (66.8 miles)
- 53K
- 25K (approximately 15.5 miles)
The Viper features four fully stocked aid station locations per loop: Bridge Aid Station (Miles 7.4 & 14.4), Refuge Aid Station (Mile 10.8), Tour de Wolf TDW Aid Station (Miles 20.8 & 27.0), and Hyde Lake Pavilion (Mile 33.4). Crew access is permitted at Refuge, TDW, and Hyde Lake; crew access is not permitted at the Bridge Aid Station. Drop bags are allowed at TDW and Hyde Lake. Parking is organized at the Tour de Wolf Pavilion area where runners pass their vehicles twice each loop.
Pacers are permitted for the 100 Miler and 107K after one full loop; only one pacer may accompany a runner at a time and pacers must follow event pacer rules and sign a waiver. Live tracking is provided for 100 mile and 100k runners.
Key policies: runners must complete the distance registered, no muling, stay on course, no littering, and complete the course on foot. Registrations are non refundable and non transferable. Deferred entry credit is 50% if deferred at least 60 days before the race, 25% if deferred at least 30 days, and no credit after March 1, 2027. Distance changes are permitted if spots are available; refunds are not issued for moving to a shorter distance. Visit the organization's website for the most recent information.
