Mamba 100 video
Western States Qualifier Race
Mamba 100 miler is a Western States Qualifying Race. Participants must finish within the 34 hour time limit to qualify.
Mamba 100
Mark your calendar for the epic return of the Mamba 100! Whether you're aiming for a PR (personal record) on your 100 miler, running your first-ever ultra, or chasing that elusive sub-24-hour finish, this course is built for speed, fun, and unforgettable memories.
Why Run Mamba 100?
This is more than a race—it’s a celebration of endurance, community, and personal achievement. With its fast course, supportive environment, and electric atmosphere, the Mamba 100 guarantees a memorable ultrarunning experience.
Sign up now and experience the thrill, the camaraderie, and the achievement waiting for you at the Mamba 100!
Finish Times (to earn your buckle or medal):
100 Miler – 34 hours
100k – 22 hours
50k – 10 hours
25k – 8 hours
Course Details:
14.35-mile loop along the scenic Wolf River, consisting of mostly single-track trails with low elevation gain.
Loops per distance:
- 100 Miler – 7 loops
- 100k – 4 loops (plus one shorter starter loop)
- 50k – 2 loops
- 25k – 1 loop
What to Expect on Race Day:
- Crew-Friendly set-up: Your crew will love the Start/Finish area, perfect for canopy tents and cheering you on between loops.
- Great Vibes: Enjoy good music, great food, and a party-like atmosphere after every loop. A sea of canopy tents, spectators, and fellow runners will keep you motivated as you cross each checkpoint.
Swag Highlights:
- 100 Milers - Choose one:
Custom Mamba 100 Hooded Puffer Jacket (black, gray, or green)
Mamba 100 Hoodie
Custom Mamba 100 Backpack (perfect for the office, gym, or trail)
- 100k Runners - Choose one:
Mamba 100 Hoodie
Custom Mamba 100 Backpack
- 50k & 25k Runners: Receive a Mamba 100 t-shirt
Extras: Your race packet will include plenty of surprises to make this experience even more special!
Dates and Times
100 Mile - Friday, November 7, 7:00AM
100k - Friday, November 7, 7:00PM
50k - Saturday, November 8, 7:00AM
25k - Saturday, November 8, 9:00AM
Aid Stations, Crew & Pacers
Aid Stations:
There will be 2 fully manned aid stations, one at the Wolf River Refuge Trailhead (Start/Finish) and one at the Walnut Grove bridge. Runners will hit the Walnut Grove Aid Station 2 times during each 14.3 mile loop. Aid Stations will have typical ultra race food options as well as soda, water and electrolyte drink. Specific aid station offerings will vary, but we will do our best to accommodate all dietary needs.
Drop bags will be permitted at the Start/Finish Aid Station only.
Crew: The crew will be able to access their runner at both aid stations. 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.
Pacers:
- Pacers will be permitted for the 100 mile and 100k. No pacers will be permitted for the 50k or 25k.
- Runners are permitted to have ONE pacer at a time.
- Pacers can be picked up at the Start/Finish Aid Station only. Pacers for 100 mile runners may start on loop 4. Pacers for 100k runners may start at loop 3.
- Pacers may NOT carry water, food, flashlights, clothing or other supplies for their runner. Muling is strictly prohibited. Pacers caught muling for their runners will result in a disqualification of the runner.
- Each pacer must pick up their pacer number and sign a release form at Packet Pickup before the race. No pacer can pace without a number and signing the release form.
- Pacers must enter and leave each aid station with their runner and must clearly identify themselves to aid station personnel. Pacers may accept aid at aid stations.
- Pacers must stay with their runner at all times; a pacer may not run ahead of their runner to an aid station. If the runner drops, then the pacer drops with them. The only exception to this rule is in an emergency where the runner cannot physically continue. In this case the pacer may continue to the nearest aid station for assistance. Note that in the event this happens, the runner will be removed from the race for safety reasons. .
- Pacers may carry their own supplies and food.
- If a runner withdraws from the race, the pacer must withdraw as well. No pacer can run without their registered runner.
- The pacer is a companion, not a leader. That is, (and we know this one is hard to enforce, so we hope that you do the honorable thing) the runner is supposed to “lead” and find and follow the course on his/her own. The pacer should always follow the runner.
- While a pacer is allowed, this race can be run without one.
Race Rules
Race Rules:
Please read carefully. It’s every runner’s responsibility to know all the rules. These are common rules in ultras and not overly restrictive. In our experience the ultra-community is very trustworthy and intentional breaking of rules is almost unheard of. Problems typically only arise when someone doesn’t understand the rules and breaks them unintentionally.
- NO DROPPING DOWN IN RACE DISTANCE DURING THE RACE – As with all of our races, we don’t allow “finishes” in distances other than what was signed up for. If you are signed up for the 100-miler, you must complete 100-miles or you DNF.
- No muling – a runner must carry all their own gear, food, water, everything. Therefore, pacers cannot give a runner any of their water, food, etc. anywhere except full/manned aid stations. At full/manned aid stations pacers and crew may assist their runners however necessary.
- No crewing outside full/manned aid stations – Crew cannot help their runner in any way outside of manned aid stations. DO NOT take anything from or give anything to runners outside of manned aid stations (NO ASSISTANCE).
- Trekking poles are allowed but please be courteous to others if using them.
- If you are planning on using a pacer and/or crew, see the “Aid Station and Pacers” section for a full list of rules.
- Littering of any kind at any aid stations, on the trails, or at the finish line is strictly prohibited.
- You may not cut the course. You must follow and stay on the trail and course and you may not shortcut it in any way. If there is a flag or marker it means stay on the trail the marker is on. It’s your responsibility to know and stay on the course. If you fail to run the course as marked you will not receive an official finish time and will not be eligible for an award – no time adjustments, no exceptions.
- You must complete the course on foot, with no assistance from vehicles, bicycles or animals. No skateboards, scooters, unicycles, hot air balloons, roller skates, sled dogs, or wagons (you get the idea).
- While headphones are allowed, please remove your headphones when approaching an aid station. It’s impolite not to.
- Please be aware of your surroundings when a runner approaches you to pass. Be respectful to other runners and make sure you can hear them when they tell you they are about to pass you.
- You are responsible for the behavior of your crew and your pacer. Out of control behavior from crew or pacer could disqualify you from the race. No one wants that and it won't be tolerated at any Mamba Trail Runners race.
- Being rude, discourteous or otherwise annoying race volunteers or staff is grounds for disqualification. Same with being rude or annoying to other runners or anyone else on the course, such as bicyclists, or hikers.
- If you receive an IV, oxygen or break a leg, your race is over. Let’s keep all our inside parts on the inside, please!
- No stashing food, drink or other supplies along the course. Drop bags at specified aid stations only.
- Generally, no cheating. If you wonder if what you are doing is cheating, it probably is. If you’re really not sure, ask us before you do it.
Age Limits:
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.
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.
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!
Accommodations
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.
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
RV camping is also available 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. The main car parking area for Viper is right across the street from the RV campground.Walmart and grocery stores are ~2 miles away.
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
Awards
Top 3 Male and Female in each race distance will receive an Award along with their buckle or medal.
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.
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
Event's current local time: 3:53 AM CT
