Viper 300
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Viper 100
The Viper 100 is an ultramarathon weekend held March 19–20, 2027, inside Shelby Farms Park in Memphis, Tennessee. The event offers multiple distances that all finish at Hyde Lake and use a common 33.4 mile loop as the primary course unit.
Distances
- 100 Miler
- 107K (66.8 Miles)
- 53K
- 25K (approximately 15.5 miles)
The 33.4 mile loop mixes paved greenways and dirt trails through lakes, forests, and open parkland. The 25K course is described as about 9.5 miles of paved trails and 6 miles of dirt trails, with a marked right turn at about Mile 1.5 for 25K runners. Road shoes are suitable for much of the course; many runners change to trail shoes for dirt sections. Trekking poles and headphones are permitted with etiquette guidelines.
Course support includes four staffed aid station locations with hydration, nutrition, and volunteers. Aid station access and rules:
- Bridge Aid Station: miles 7.4 and 14.4, no crew access.
- Refuge Aid Station: mile 10.8, crew access permitted.
- Tour de Wolf Aid Station: miles 20.8 and 27.0, crew access and drop bags permitted; primary crew hub and parking nearby.
- Hyde Lake Pavilion: mile 33.4, start and finish hub with crew access, drop bags, and a sleep station for longer distances.
Pacers are allowed for the 100 mile and 107K after completing one full loop; one pacer at a time and specific pacer rules apply. Live tracking is provided for 100 mile and 100k entrants. Parking is organized at the Tour de Wolf Pavilion area, with vehicles passed twice each loop. Packet pickup occurs at Hyde Lake Pavilion on the day before race week activities and reopens the morning of race day. Registration is non refundable and non transferable; deferred entry credits are available on a sliding scale with no credit after March 1, 2027. Visit the organization's website for the most recent information.
