November 8 - 9, 2024

Mamba 100

S. Walnut Bend Rd.

Memphis, TN 100 Miler, 100K, 50K, 25K

Registration closes: Sun, Nov 3 @ 11:59PM CT

Mamba 100 SOLD OUT

All race distances for the Mamba 100 are sold out. We have a Waitlist available for any race distance and when someone drops, we will add the first one on the list.

If you don't make it in this year, then we would love to have you in for next year. We also host the Viper 200 / 100 / 53k in April of 2025, and that race will use most of the Mamba 100 trails.

$2000 Cash and Raffle Prizes

Mamba 100 is back and better than ever in 2024! This year, we're upping the prize ante to a total of $2,000. 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 at the pre-race dinner. 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. This past year we gave out over 30 raffle prizes from cash - t shirts - hats - hoodies - Mamba 100 puffer jacket - water bottle - singlets - books and more.

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!

Dates and Times

Thursday, Nov. 7th - Pre-race Pasta Dinner
Friday, Nov. 8th 7am - 100 mile start time 7pm - 100k start time
Saturday, Nov. 9th 7am - 50k start time 9 am - 25k start time

All races end at 5 pm on Saturday Nov. 9th

Packet Pickup and Pre race Dinner

Packet Pickup will begin at Noon on Thursday, Nov. 7th. This will be at the FedEX Event Center at Shelby Farms Park. Come by and get your packet, then walk the 2.25 mile paved trail around Hyde Lake, or take a walk up to see the Bison. There is so much to walk around and see at Shelby Farms Park.

The pre race pasta dinner will be on Thursday, Nov. 7th @ 5pm so after you get your packet, then stay for the dinner and enjoy a fun night of food and fellowship. You must have a dinner ticket to attend this event. This will be a buffet style dinner provided by Coletta's with the menu being: Italian salad, garlic breadsticks, Italian marinated chicken, mashed potatoes, and 2 pasta dishes. The pasta options include: spaghetti with meat sauce, bowtie alfredo, penne with marinara sauce, pasta primavera (pasta with fresh vegetables in an olive oil & garlic sauce). We will give away lots of raffle drawings and you must be present at the dinner to win.

Race Distances

100 miler: Whether you're a veteran 100 mile runner or this is your very first 100, the Mamba 100 miler is the race for you. You'll have lots of support from the volunteers and your friends/family to help you finish the 100 miles. The course is set up for you to finish. Its an easy trail run course as the loop is broken down into many small sections that change up the scenery. One mile you'll be on trail covered by trees, and the next mile you'll be in an open field surrounded by deer. Included with your registration is a very nice hooded puffer jacket with the Mamba 100 logo on it (colors may vary), and you can bet the buckle will have a snake on it. You'll be able to bring your own canopy tent area to set up at the start line for your personal aid station and for your crew to hang out. Your crew will have a lot of fun crewing as the start/finish line will be busy with great music and a fun atmosphere. If you're deciding what distance then why not go for the 100 miler? We will do everything we can to get you across the finish line.

100k: A night time start of 7 pm. How cool is that? These runners will get to start and run fresh into the night and finish in the sunrise hours of the morning. Not only that but you'll join the 100 milers who'll be 12 hours into their race so you will have an immediate impact on those runners by boosting them up for their night run too. Headlights are a must for the night as the trail gets dark. There will be lots of volunteers set up all along the course so you'll never feel like your alone for miles and miles at night. Your family and friends will have quite a few opportunities to see you along the way as the course is set up for ease of access for friends. So come run this unique distance and start at night. We'll be sure to have a big cheering crowd for you to start your run at 7 pm

50k: This race starts at 7 am on Saturday Nov. 9th and you'll be cheering on and seeing the 100 milers that finish around the 24 hour time limit. You'll be the cheerleader for the tired 100 milers then you'll get to go run your race. This race will be 2 loops with a very small 2.5 mile loop at the start. This race will go quicker than you think as the loop is pretty fast. You can walk a lot of it and still finish in time.

25k: And the last race starts at 9 am on Saturday Nov. 9th. You'll run 1 loop + 1.2 mile at the start for this race. You can walk most of this race and still finish in time. This is the perfect race for anyone looking for a fast time or your first time 25k.

Mamba 100

Mamba 100 in 2023 was a huge success as we are so excited to have it again in 2024. If you are looking to PR your 100 miler or run a sub-24 hour, then this race is perfect for you. It's also a race for a first time 100 miler, or any distance. All race distances will end at 5:00 pm on Saturday Nov. 9th. That's 34 hours to finish the 100 miler, 22 hours to finish the 100k, 10 hours to finish the 50k, and 8 hours to finish the 25k. You must finish by 5:00 pm on Nov. 9th to earn your buckle or medal. With very little elevation gain this race will be fast and fun. The race will be mostly on single track trails with half the loop running right along the Wolf River. The course will be a looped course at 14.30 miles long. 7 loops for the 100 miler. 4 loops for the 100k (with a shorter loop at the start), 2 loops for the 50k, and 1 loop for the 25k.

The Mamba 100 is the perfect race for your crew to setup their canopy tent and hang out at the Start/Finish line. After each loop you'll be welcomed by good music and great food and a mild-like party atmosphere. There will be a ton of canopy tents lined up along the race route as you finish each loop. You'll be welcomed by many people cheering you on as you run your race. This race has so much going on at all times that you'll be guaranteed to have a great time.

Live Tracking

New this year, the 100 mile and 100k distance will have Live Tracking. Your crew, family, or friends will be able to see you in real time how you're doing in your race.

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 October 8th, 2024.

For More Information

For more information join these pages:
Facebook Group: Mamba Trail Runners (this page is packed with information from group challenges to a runner's bio.)
Instagram: Mamba Trail Runners
Youtube: Mamba Trail 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 12 times with photos and 3 articles in the magazine. So your photo from the Mamba races just might make it in Ultra Running magazine!

Pacers, Crew and Gear

All 100 miler and 100k runners are allowed a pacer. The 100 mile runners can pick up a pacer after mile 50 when you get back to home base aid station. The 100k runners can pick up a pacer after mile 35 when you get back to home base aid station.

All runners are allowed a crew for support. No support from crew outside of designated aid station crew areas. The 100 miler and 100k runners are allowed to set up a canopy tent at the start/finish aid station area. Here your crew can hang out and you can have all your necessary belongings you need for the race. There will be no drop bags outside of the start/finish line area. The trail is open to the public during the daytime hours so don't be leaving any valuable personal things at your area without it being supervised. The volunteers aren't responsible to watch over personal belongings.

Trekking poles are allowed for the race for any distance runner. If you need trekking poles for some of the race then bring them and leave them in your bag at the start/finish area and you can grab them when you think you need them. Some of the trails are tight in areas and having poles when you don't need them just takes up that much more room.

Shoes: You can run the entire race on road shoes or trail shoes and no gaiters are needed. There are no rocks on the trail, just a few roots sprinkled along the way.

Age Limit Requirements

100 miler - 18 years old and up
100k - 18 years old and up
50k - 17 years old and up (Parent or Guardian must sign Waiver)
25k - 16 years old and up (Parent or Guardian must sign Waiver)

There are no exceptions to the age requirements listed above.

RV Camping

The Mamba 100 has plenty of RV camping at the RV Park at Agricenter International. Within walking distance of the start line of the Mamba 100, 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 Mamba. The main car parking area for Mamba is right across the street from the RV campground.

Accommodations, etc. (Hotels)

The Wolf River Trailhead (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. 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. This will be about a 3/4 mile walk to the start line. There are limited parking spots at the start line but those will be reserved for volunteers. 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. There is a gate to the parking lot by the start/finish line that will be closed at sunset Friday night and won't open until sunrise Saturday morning. The parking area where runners and crew park does not have a gate. You'll be able to leave at any part of the day or night if needed.

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.

Bathrooms: There will be port-a-pottys at the start/finish line and at Aid Station #2.

Aid Stations and Night Course Marshal

There will be 2 manned aid stations fully-stocked with water, electrolyte drinks, gels, snacks, food, first aid, and enthusiastic volunteers! Hot food will be provided for the 100 miler and 100k runners at night. This is also a cupless race so you must carry your own hydration vessel (bottle, pack, collapsible cup).
There will be several Night-time Course Marshals walking along the trails to assist any runners during the 100 miler or 100k. The course marshal duty is to manage the safety of the runners at night as this is my #1 commitment. The course marshal will not provide hydration or food to runners.
The start/finish line will have an aid station, then you'll run 3.8 miles to the next aid station. After this aid station you'll run 7.5 miles then come back to this same aid station. Then run 3 miles back to the start/finish line aid station.

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.

Event's current local time: 12:59 PM CT


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