Mamba 100 video
2025 - Mamba 100
The Mamba 100 in 2025 will be Nov. 7-8th.
Registration opens on Black Friday (Nov. 29th) at 1 pm.
Western States Qualifier Race
Mamba 100 miler is a Western States Qualifying Race. If you finish the 100-mile distance under the 34-hour time limit, then you will qualify for Western States 100.
Dates and Times
Thursday, November 6th - Packet Pickup (Time and location announced at a later date)
Friday, November 7th
7am - 100-mile start
7pm - 100k start
Saturday, November 8th
7am - 50k start
9am - 25k start
All races end at 5pm on Saturday, November 8th.
Packet Pickup
Packet Pickup will be on Thursday, November 6th, 2025. Time and location will be announced at a later date.
Mamba 100 info
Mamba 100 in 2024 was a huge success as we are so excited to have it again in 2025. 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. 8th. 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. 8th 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 14.35 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.
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. 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. In addition, the 100-mile distance is a Western States Qualifier race.
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 you're 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. 8th 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. 8th. You'll run 1 loop + 1.2 miles on paved road/trail 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.
Swag
100 milers will have the option of receiving a custom Mamba 100 hooded puffer jacket, hoodie, or a custom Mamba 100 backpack. The backpacks can be used anywhere from the office, to the gym, to the trails.
Colors of jackets will be based on what is available. Colors will be black, grey, or green. Only choose 1 option.
100k runners will have the option of receiving a Hoodie or a custom Mamba 100 backpack. Only choose 1 option.
50k and 25k runners will receive a Mamba 100 t shirt
Your packet pickup bag will be full of surprises.
Sponsors
We would love for you or your company to sponsor the Mamba 100. We have many different types of sponsorships available. Please reach out to mambatrailrunners@gmail.com if interested. Sponsoring the race will guarantee you a 10x10 canopy tent spot right by the Start/Finish line of the race.
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 the 2nd 14.3 mile loop, 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.
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.
Photographer
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!
Awards
Top 3 Male and Female in each race distance will receive an Award along with their buckle or medal.
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 7th, 2025.
Trail Sisters Approved Race
We are so excited that the Mamba 100 is a Trail Sisters approved race. In 2024, we had an almost 50/50 Male to Female ratio. What an amazing site it was to see a balanced race of male and female runners.
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 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
Accommodations, etc. (Hotels)
The Wolf River Refuge Trailhead (start / finish line) is located right off Germantown Parkway and there are numerous hotels, restaurants, grocery stores, gas stations, etc. all along Germantown Parkway. Everything you can possibly need is within a mile or two from the Trailhead.
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.
Event's current local time: 11:05 PM CT
