At a glance
- Date
- Nov 6–7, 2026
- Location
- Memphis, Tennessee
- Distances
- 100 mi, 100K
- Aid stations
- 2, 1 with crew access
- Registration
- Closes Nov 2, 2026, via ultrasignup.com
Listed from UltraSignup. Checked Oct 19, 2026.
Plan this race for free
2 aid stations are already loaded. Add cutoffs, pacing and the timeline your crew follows. Crew invites and race-day updates come with a Race Pass.
Build my planAbout this race
The Mamba 100 is an endurance race on flat, fast Wolf River singletrack trails in Memphis, TN, serving as a Western States Qualifier. The course is centered around a 14-mile loop with distances ranging from 25K to 100 miles.
Key dates
Registration closes
Nov 2, 2026
Race day
Nov 6, 2026
Pricing
100 Miler
Registration
$330
100K
Registration
$215
50K
Registration
$115
25K
Registration
$100
Email me updates about Mamba 100
Registration openings and major changes, like a new date or a cancellation.
Aid stations
2| Station | Distance | Crew | Drop bags | Cutoff | Supplies |
|---|---|---|---|---|---|
Bridge Aid Station Located approximately miles 4.5 and 9.5 each loop on the 14-mile loop course. Crew access is not permitted here; crew may only access runners at the Start/Finish Aid Station. | -- | -- | TailwindwaterGatoradeCoca-Cola+15 | ||
Start/Finish Aid Station Located at mile 14 of each loop. Primary hub for crew, drop bags, personal aid station, and canopy tents. Lasagna served here during evening/overnight hours. | -- | -- | TailwindwaterGatoradeCoca-Cola+16 |
Entry transfers
Can't race, or need an entry? Post it here so nobody has to ask if it's still available.
Similar races
Creek Trail Crusher
Nov 14Paragould, AR100.01 mi, 50 mi +1
Also 100 miles, 76 mi from Mamba 100, registration open
The Next Loop | Pinnacle Mountain
Nov 7Roland, AR100 mi, 100K +2
Also 100 miles, the same weekend as Mamba 100, registration open
Spirit of Syllamo
Dec 12Norfork, AR100 mi, 38 mi
Also 100 miles, 145 mi from Mamba 100, registration open
Straight-line distance
More 100 Mile Races in Tennessee
All races in TennesseeNo Business 100
Oct 23Jamestown, TN100.62 mi
Fall Creek 100
Nov 21Spencer, TN100 mi, 100K +1
Viper 100
Mar 19, 2027Cordova, TN100 mi, 107K
Races Near Memphis
Cobra Den Winter Series
Dec 12Memphis, TN
Forest 1/2 Marathon and 7 Miler
Dec 12Memphis, TNHalf Marathon, 7 mi
Moccasin Ultra Fest
Dec 31Memphis, TN36 hr
Last Mamba Standing
Oct 23, 2027Eads, TNBackyard Ultra
Night Serpent 5k
Oct 30Eads, TN5K
Memphis Running Festival
Nov 14Memphis, TN12 hr, 6 hr +3
Red Banks 5K Run/Walk for Joni & Friends
Oct 24Red Banks, MS50 mi
Field Fest 5K Trail Run
Oct 24Abbeville, MS5K
Village Creek 10k/25k Trail Run
Jan 23, 2027Wynne, AR25K, 10K
Trail of Fears
Dec 19Jackson, TN
Creek Trail Crusher
Nov 14Paragould, AR100.01 mi, 50 mi +1
November Races Nearby
All November racesThe Possum at Woolly Hollow
Nov 7Greenbrier, AR
Turkey Trails - Little Rock
Nov 7North Little Rock, ARHalf Marathon, 10K +2
Tupelo Trail Shuffle
Nov 21Belden, MS20K, 10K
Race planning
Plan Mamba 100 with Crewable
Build your aid station plan, organize your crew, and dial in your nutrition strategy. Everything you need to finish strong.
Build my planAre you the race director for Mamba 100?
Claim this race to manage registration, volunteers, and race day.