Viper 300
Cordova, United States • 9-14 Mar 2026
Event overview
The Viper 300 is a multi-day ultrarunning event at Shelby Farms Park in Cordova, Tennessee, held March 9-14, 2026. Distances offered include:
- 300 Miler
- 200 Miler
- 100 Miler
- 53K (Friday night)
- 25K
Registration closes March 7, 2026. Live tracking will be available for the 300 and 200 mile races. Packet pickup is scheduled at the Hyde Lake Pavilion on March 8 and reopens on March 9 while the park is open.
Course, support and rules
The main loop is about 33.4 miles per loop, combining paved paths and single-track trails within Shelby Farms Park. The course passes lakes, wooded areas, and wildlife habitat; the park is noted to include a herd of buffalo. Two fully manned aid stations will be staffed at Hyde Lake Pavilion (start/finish) and Tour de Wolf Pavilion; runners will visit the Tour de Wolf aid station twice per loop. There will also be at least one unmanned aid station, covered sleeping areas at both manned aid stations, and drop bag access at those aid stations.
Key rules: runners must finish the distance registered, no muling, no crew assistance outside full manned aid stations, no course cutting, and the course must be completed on foot. Pacers are permitted only for the 300, 200 and 100 mile races, limited to one pacer at a time, and must follow pacer-specific procedures at packet pickup and aid stations. No refunds or bib transfers; partial race credit deferrals are available with deadlines. Visit the organization's website for the most recent information.