Viper 300

Event Overview

The Viper 300 is a multi-day ultramarathon event taking place in March 2026 in Shelby Farms Park, Memphis, Tennessee. It offers five race distances: 300 Miler, 200 Miler, 100 Miler, 53K (a Friday night race), and 25K. The primary course is a 33.4-mile loop run on trails within the park.

Course Details

The course features a mix of paved paths and single-track trails that pass by lakes and wooded areas. The park is home to wildlife including deer and buffalo. The event uses a looped course format, with distances like the 300-mile race comprising multiple laps of the main loop. A separate, shorter course is used for the 25K distance.

Aid Stations and Logistics

Key locations are the Hyde Lake Pavilion (start/finish) and the Tour de Wolf Pavilion Aid Station, both serving as crewed aid stations and sleep stations with cots. An unmanned water station is located at the Wolf River Refuge Trailhead. Aid station support levels change during the event, with additional stations opening for night races. Crew access is permitted at manned aid stations, and drop bags are allowed at specified locations. On-course parking is available for runners and crew.

Rules and Participation

Specific race rules include: no dropping down in distance mid-race, no muling (pacers cannot carry items for runners between aid stations), no crewing outside of manned aid stations, and no littering. Pacers are allowed for the 300, 200, and 100-mile distances only, starting after a certain number of loops are completed. Trekking poles are permitted. An official photographer will be present. Visit the organization's website for the most recent information.