April 2 - 5, 2025

Viper 200


Memphis, TN 200 Miler, 100 Miler, 100M Team of 4, 53K

Registration closes: Wed, Mar 26 @ 11:59PM CT

Dates and Times

200 miler - Wednesday, April 2nd - 6:30am - Start of the 200 miler. (86.50 hours to finish)
100 miler - Friday, April 4th - 7am - Start of the 100 miler. (38 hours to finish)
100-mile night relay - Friday, April 4th - 7pm - Start of the 100 mile relay (26 hours to finish)
53K - Saturday, April 5th - 8am - Start of the 53K (13 hours to finish)
Saturday, April 5th - 9pm - All races end.

"Relay race may change start time, but it will start on Friday night"

About the race

Viper 200 is another race by the Mamba Trail Runners which is famous for the Mamba 100 held in November. Viper 200 has 4 different race options. A 200 miler, 100 miler, 100 mile relay (teams of 4) and a 53K. The course is a 33.3 mile loop that travels all around the beautiful Shelby Farms Park dirt and paved trails. The dirt and paved trails are surrounded by tall, beautiful trees as well as the open air breeze off many lakes including Hyde Lake, the main lake at Shelby Farms. Not only are the trails beautiful, but you'll run past a herd of Buffalo that live in the park. You'll see numerous deer and other wildlife all throughout the course. The deer are very friendly and see visitors everyday so don't be surprised if you come very close to one as you run your race.

The race will give out Incredible swag to all runners. 200 mile runners will receive a hooded puffer jacket with the Viper 200 logo on it, while the 100 milers and 53k will receive a fleece long sleeve shirt with the Viper logo on it. All runners will receive a race short sleeve t-shirt.

The start/ finish line will be at the Agricenter Show Place Arena area. Here, there is lots of parking for crew, family, and friends. There is also RV Camping within walking distance to the Start line. This area is perfect for your crew to stage or set up your personal aid station. The aid station at the Start/Finish line is inside a building with public restrooms and showers. We will have a sleep station set up here that will be a tent with walls set up outside. Depending on the weather, we will climate control the tent with heaters or fans. We will provide cots with pillows and blankets for the runners to sleep. Tour de Wolf Aid Station will also have the same set up for a sleep station. We will provide a tent, with cots, pillows, and blankets for the runners. You'll hit the Tour de Wolf aid station twice in a loop. You'll have the opportunity to sleep three different times during a 33.3 mile loop. We encourage runners to only sleep at designated sleep stations.

$2000 Cash and Raffle Prize

$2000 Cash and Raffle Prizes
For the inaugural year of the Viper 200 we are giving out $2,000 total cash. ALL registrants are eligible to win! 5 registered runners will be drawn at random to win cash in the amount of $1,000, $500, $300, $100, and $100. We will announce the winners of the cash drawings and raffle prizes before the race. What other races are out there where you could win $1,000 simply for registering for the race?

Not only do you have a chance to win lots of cash but you also have the chance to win raffle prizes. You can only win 1 prize. Once your name is drawn, it will not be added back to the drawings. The cash drawings will be first so every runner has the chance to win the big money!

Key Facts:

- 33.3 mile loop
-1,000' elevation gain per loop
-Course: dirt and paved trail, mostly flat. Single-track dirt trail with tall, beautiful trees
-Numerous lakes on the course
-Run past the Buffalo (yes - real Buffalo live at the park) Other wildlife: numerous deer, rabbits, dogs, turtles, etc.
-The park sees thousands of visitors a day and they'll all encourage and cheer you on as you run
- Aid Stations and un-manned aid stations
-The course is mainly flat, non-technical fast. Expect very fast times.
-Beautiful springtime weather. Memphis average High is 70 and Low is 50 for this time of the year.
-Perfect to bring the family, friends, and crew. The park has plenty of things to do for family and friends.
- Live GPS Tracking for 200- and 100-mile runners
- $2,000 total cash given out to 5 different registered runners


We have one of the best coming to be the official photographer of the race. Jenny El Tee is bringing her photography talent to get the best shots of all runners and their race experience. Her work has been featured 2 times on the front cover of Ultra Running Magazine (March 2023 and November 2021) and being published numerous times with photos and articles in the magazine, including the Mamba 100 (March 2024 issue). So your photo from the Viper races just might make it in Ultra Running magazine!

RV Campground

The Viper 200 has plenty of RV camping at the RV Park at Agricenter International. The RV Park offers sites with sewer, 30-amp & 50-amp electrical hook-ups, water, dump station, restrooms, shower, and laundry facilities. The RV Park at Agricenter is the perfect location if you plan on bringing or renting an RV for Viper. The main car parking area for Viper is right across the street from the RV campground.

100 mile relay race

The 100 mile relay race will start on Friday night April, 4th with teams of 3 runners. You have the option to have a 4th runner (ghost runner). If you have a team of 3 then each runner will run 1 loop (33.3 miles) and the exchange will be at the start/finish line aid station. The first runner of the relay team will check-in for the team and start the race. The other runners are not required to be there until it is their time to start. This means you may start your relay run for your team at 3 am or any other time during the night or early morning hours.

Teams of 4 will have the same set of rules that the teams of 3 have. Except you can have a ghost runner that can pick up any runner at the Tour de Wolf Aid Station. The ghost runner can run the Tour de Wolf trail loop or they can run from the Tour de Wolf Aid Station back to the finish line. If they run from the Tour de Wolf Aid Station back to the finish line then the previous runner becomes the Ghost runner.

There course is divided into 3 parts, Start line to the Tour de Wolf Aid station (12 miles). Tour de Wolf Aid Station back to the Tour de Wolf Aid station (11 miles). Tour de Wolf Aid Station back to the finish line (12 miles). The ghost runner can only run part 2 or part 3 only. The main runner must run 2 parts. So, if the ghost runner runs the last part, then the main runner must run part 1 and 2.
If the ghost runner runs the last part then the previous runner become the ghost runner for the next runner.

The relay race is all based on honor system. We will not give out buckles to the relay runners but we will give out a winning prize to the winning team. Relay teams can be all male, all female, or Coed. We will give out a winning prize to each category.

About Shelby Farms Park

At 4,500 acres, Shelby Farms Park is one of the largest urban parks in the country! Located in Memphis, Tennessee, the Park is both a vibrant community hub and a retreat from the hustle and bustle of urban life.

Public parks like Shelby Farms Park play an important role in creating a just and equitable community for all, and everyone is welcome here! Whether you play the Park on foot, on wheels, in the trees, in the open or on the water, Shelby Farms Park has something for everyone.

Shelby Farms Park features more than 40 miles of trails, both paved and unpaved, that are popular for walking, biking, running and hiking. The Park's trail network includes Shelby Farms Greenline, an iconic 10.65-mile paved cycling and pedestrian trail that connects the heart of Memphis to the heart of Cordova through Shelby Farms Park.

The Park is home to more than 20 bodies of water which provide plenty of opportunities for fishing.

It's also home to a herd of buffalo!

Kids can play and discover all sorts of fun at the award-winning Woodland Discovery Playground and make a splash at the Water Play Sprayground.

For more unique adventures, try horseback riding, treetop adventures or play a game of paintball or laser tag.

There is even fun to be had for four-legged friends! Dogs are welcome to explore the Park's trails (on-leash, leash in hand at all times) and to visit The Outback for off-leash fun!

If you work up an appetite, grab a quick snack in the Lake's Edge Shop, or head to the restaurant located in the Park!

Shelby Farms Park is special, and it's a great setting for special events! Indoor and outdoor venues are available for meetings, picnics, festivals, races, galas, weddings and more! The best part? Your rental fees support Park operations!

Shelby Farms Park is a people-powered park -- Shelby Farms Park Conservancy is proud to raise 75% of the Park's $5+ million annual operating budget! Shelby Farms Park and Greenline are managed and operated by Shelby Farms Park Conservancy, a 501(c)3 nonprofit organization. To support the daily operations of Shelby Farms Park and Greenline, please click here to make a one-time or recurring donation. Your support will help keep the Park and Greenline clean, green, open, operating and safe for the whole community!

A portion of your registration fees goes directly back to Shelby Farms Park and to the Agricenter.


The Agricenter (start / finish line) is right off of Germantown Parkway and you'll have everything you need all within a mile or two. There are four hotels a mile away and this entire area is in a great part of Memphis.

Holiday Inn Express & Suites 7784 Wolf Trail Cove Germantown, TN 38138 (901) 309-6700
Courtyard Memphis/Germantown 7750 Wolf River Blvd. Germantown, TN 38138 (901) 751-0230
Homewood Suites 7855 Wolf River Blvd. Germantown, TN 38138 (901) 751-2500
Hampton Inn & Suites 1680 S. Germantown Rd. Germantown, TN 38138 (901) 309-0555

Walmart and Kroger are 2 miles away. Kroger is the Memphis area grocery store

Restaurants - There are many restaurants packed up and down Germantown Parkway

Breakaway Running Store - less than a mile away for all your running needs and gear

Things to do: Visit Shelby Farms Park. The trails that the Mamba race are ran on are part of Shelby Farms Park. The park is huge covering 4,500 acres and is one of the largest urban parks in the country. There are over 40 miles of trails both paved and unpaved and over 20 lakes. The park is also home to a herd of buffalo that you can see while walking the trails. www.shelbyfarmspark.org is the website so check out all there is to do here.

Parking for the race: Parking will be on the Agricenter grounds next to the corn maze. You will be able to drive to the start line and drop off your things but must park in the parking area for runners. The parking lot area will have security the entire time of the race.

The trails are open to the public during the day so not only will you see runners but you'll see people walking the trails or riding their bike. There will be signage months before the race telling people about the race that weekend.

Pacers, crew and gear

Pacers will be allowed for 200-mile and 100-mile runners. No pacers for 100-mile relay or 53K runners.

Pacers can only start from the Start/Finish line Aid Station after loop 2. This is at 66.6 miles.

Pacers cannot carry anything for their runner (no muling), nor can a pacer run ahead of their runner to an aid station. Pacers must stay with their runner at all times. If the runner drops, then the pacer drops with them.

Crew: The crew will be able to access their runner at the Start/Finish line Aid Station and the Tour de Wolf Aid Station. No crewing at any other spots along the course. You are welcome to cheer and encourage your runner along the course as there are many places to set up and cheer. If a runner is caught receiving assistance other than the Aid Stations, then it will result in a Disqualification.

Gear: Average Highs and Lows in Memphis at this time of year is 70/50. But like most places in the Spring we could get cold fronts with storms which can cause the temperature to drop. Plan accordingly. Road shoes are perfectly fine for this course, but it would be best to have a set of trail shoes too.

Trekking poles are allowed.

Age Requirements

All races are 18 and up

There are no exceptions to this rule.

Agricenter (start line)

Agricenter International is a not-for-profit organization that provides economic development and improved quality of life by facilitating agricultural research, educational programs, environmental conservation, natural area preservation, and recreational opportunities.

Agricenter International has been serving the agricultural community and the citizens of Shelby County for four decades. In that time, we have focused on providing a place where people can come and enjoy the wonders of a farm in a large metropolitan city. This is one of the opportunities that makes our organization and this campus unique. Agricenter is a special place that has hosted tens of millions of people over the years "a Farm in the City".

Agricenter International has a rich history in advancing agricultural research and education. As the world continues to explore how the latest in technology, production practices, and conservation work together to achieve a well-fed population and healthier planet, we aim to be at the forefront of helping build solutions to today's challenges and educating producers and communities near and far about the big picture of agriculture today.

There is a huge Farmers Market here to walk around and pick up some delicious vegetables and other market foods

Transfer of Distance

You can upgrade to a longer distance by paying the difference in pricing. This is only available if spots are open in that race. Dropping down in a distance will not be refunded the difference.

For More Information

For more information join these pages:

Facebook Private Group: Mamba Trail Runners (this page is packed with information from group challenges to a runner's bio.)
Instagram: Mamba Trail Runners and Mamba__XT
Youtube: Mamba Trail Runners

Refund Policy / Roll Over Credit

No refunds and no bib transfers.

Entry can be deferred for 50% race credit if done at least 60 days prior to the race. Entry can be deferred for 25% race credit if done at least 30 days prior to the race. No race credit after March 1st, 2025.

Live Tracking

The 200 - mile and 100 - mile runners will have Live Tracking

The 100-mile relay and 53k will not have live tracking.

Event's current local time: 1:22 AM CT

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