Viper 300

Viper 300 : Shelby Farms Park, Memphis TN

The Viper 300 is an ultrarunning event held inside Shelby Farms Park, using a 33.4-mile loop that mixes paved greenways and winding dirt trails. The course passes lakes, woods, and open parkland; wildlife such as deer and buffalo may be seen from the trail. All distances finish at Hyde Lake, which serves as the main hub and start/finish area.

Distances include:

• 300 Mile
• 200 Mile
• 100 Mile
• 53K (Friday night)
• 25K (about 15.5 miles)

Aid stations are positioned around the loop with a combination of unmanned water points and fully manned stations. Fully manned stations at TDW and Hyde Lake allow crew access and drop bags; drop bags are permitted at Hyde Lake and TDW but are not allowed for 25K runners. The Tour De Wolf (TDW) parking area is used for race parking and provides frequent access to personal vehicles during each loop.

Pacers are permitted for the 300, 200, and 100 mile distances only. One pacer at a time is allowed; pacers must register at packet pickup, may not carry supplies for their runner, and must follow the pacer rules. Live tracking will be available for 300, 200, and 100 mile competitors. Race photography is provided and photos will be free to runners.

Registration is non-refundable and non-transferable. Deferral credits are available at 50% if deferred 60 or more days before the race, 25% if deferred 30 or more days before the race, and no credit after March 1, 2026. Visit the organization's website for the most recent information.