The Viper 300 takes place inside Shelby Farms Park in Memphis, TN, one of the largest urban parks in the country and a truly unique setting for an endurance race. This event brings runners together on a 33.4-mile loop that blends smooth paved greenways with winding dirt trails, creating a fast, runnable course surrounded by lakes, woods, and wide-open natural landscapes. From the first mile to the final stretch into Hyde Lake, the course is designed to keep you moving, engaged, and pushing forward. Along the way, runners may encounter local wildlife, including deer and even buffalo roaming in the distance, adding to the one-of-a-kind experience of racing through this incredible park.

Shelby Farms Park isn’t just a race venue—it’s an experience. While runners are out on the course, crews and families have access to everything the park has to offer, including coffee at Bell Tower, dining at Coastal Fish Company, zip lining, fishing, horseback riding, paddle boats, kayaks and canoes, frisbee golf, and miles of trails to explore. There is also a massive Discovery Playground located right next to the Tour De Wolf (TDW) Aid Station, making it a perfect hub for families and kids to enjoy while cheering on runners throughout the race.

With a course built for performance and a venue that delivers both beauty and energy, the Viper offers something rare—a race where the challenge is real, the setting is unforgettable, and the entire experience, for both runners and their supporters, is second to none.

Moccasin 24 Hour Run

Get ready to run as many miles as you'd like in the Moccasin 24 hour run. The course will be a 4 mile loop on the Wolf River Trails in Memphis, TN. Once we start the run, the clock will tick down from 24 hours all the way to zero, which will end the run. You are welcome to run as many miles as you can, as fast or slow as you want, and at whatever pace or time you want. We will have a large canopy tent with walls up at the Start/Finish line where we will all gather under and hang out. This is where you'll rest before you run again. You are welcome to bring your own canopy tent and personal aid station as well. You can start at any time during the 24-hour window so if you don't make it for the start of the race, then you can still show up 3 hours later and jump in the run. What better way to end the year by running some big miles. Can you run 100 miles under 24 hours? Can you run 52 miles and earn a buckle? Come see the trails alive at night with Christmas lights and decorations. (all lights are battery operated so there is only so much we can do). Come hang out and sit by our bonfire, eat smores, and tell Christmas stories all night.

24 hour run starts at Noon.

Family fun 4 mile run

On Friday night, December 26th, we will have a 4 mile run only. This run/walk will be for children of all ages with a parent/guardian. All registered runners will receive a medal at the end of their run. This is a perfect run to introduce kids into trail running. We will have the trails decorated with Christmas lights and maybe a few more fun Christmas surprises along the way.

Western States qualifier
- 100 miler

Mark Your Calendar – The Mamba 100 Is Back!

Get ready for the epic return of the Mamba 100—a celebration of endurance, community, and unforgettable achievement! Whether you’re chasing a PR, tackling your first ultra, or going for that sub-24-hour buckle, this fast and fun course is built to push your limits and deliver lasting memories.

Why Run the Mamba 100?

This isn’t just a race—it’s a movement. With a scenic, low-elevation loop along the Wolf River, a crew-friendly layout, and an electric atmosphere, the Mamba 100 delivers everything you love about ultrarunning:

Speed-friendly singletrack
Unmatched camaraderie
Awesome post-loop energy
Swag that actually slaps

Finish Time Limits (Earn Your Buckle or Medal):

100 Miler: 34 hours
100k: 22 hours
50k: 10 hours
25k: 8 hours

Course Overview:

14.35-mile loop on scenic Wolf River trails
Mostly singletrack with low elevation gain

Loop Breakdown:

100 Miler – 7 loops
100k – 4 loops + starter loop
50k – 2 loops
25k – 1 loop

Race Day Perks:

Crew Heaven: Set up canopy tents at the Start/Finish for prime cheering and support between loops.
Party Vibes: Great music, tasty food, and a high-energy village atmosphere after every loop.
Motivation Everywhere: Fellow runners, friends, and spectators create a wall of encouragement every time you pass through.
Sub 20 hr. and Sub 24 hr. 100 mile buckles

Swag Highlights:

100 Mile - Hooded puffer jacket, Sweatpants, Backpack, long sleeve shirt, Hat (pick one)

100k - Sweatpants, Hat, Backpack (pick one)

Bonus: Your race packet comes loaded with surprises to make this event even more memorable!

ChatGPT Image May 8, 2026, 09_03_32 AM_edited.jpg

Ignite your competitive spirit with the exhilarating Cobra Den Trail Series, featuring four unique races amidst the stunning Tour De Wolf and Wolf River Trails in Memphis. Commencing with the striking Cape 5k and 10k on June 13, 2026, followed by the thrilling Samar 4 and 8 milers, the dynamic Caspian 5 and 10 milers and ending with the challenging King 7 miler and Half Marathon, this series promises an adrenaline-filled summer.

Expect a live, vibrant atmosphere, with rocking music, water/aid stations stocked with energizing snacks and cooling towels. All races are chip timed, with results announced on UltraSignup.
All participants receive a signature T-shirt along with a medal for each race.

Can't make it for an in-person race but still want to participate in the series? Then join us for our virtual Cobra Den Trail Series. All participants receive a signature T-shirt along with a medal for each race.

Our goal is inclusivity, so we've made cutoffs loose. However, consider the Short Series if you can't maintain a 17-min/mile. For Long Series, 20-min/mile cut-off applies.

IF you can't run the entire series, you can run each of these races individually as it's own race.

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