The 18th annual Mystery Mountain Marathon & 12-Miler (aka MMM) features marathon and 12-mile trail races traversing difficult, sometimes technical, but stunningly beautiful trails, with panoramic views of fall foliage displayed on the surrounding mountains. The elevation gain for the marathon is about 5,500 feet runners will enjoy single track, rugged mountain bike, and smooth horse trails while running over and around Fort Mountain, passing the mysterious rock wall built at the top of the mountain over 1,000 years ago. But the highlight of the weekend, as always, will be hanging out by the lake with friends old and new after the race at our fun, low-key celebration. Join us! The event is located at gorgeous Fort Mountain State Park, approximately 90 miles north of Atlanta and 50 miles southeast of Chattanooga. For more race information, visit the MMM race page on our website: MMM
Enter before Saturday, Sept 26 for guaranteed shirt size. Join GUTS for just $15 a year and receive $5 off GUTS races plus other benefits. GUTS Membership is available on Ultrasignup - GetGUTS
12 Miler: 6-hour time limit 3.5 hours at Park Entrance (approx 8 miles) Marathon: 8-hour time limit Cutoffs along the course are as follows: 3.5 hours at Park Entrance (approx 8 miles) 3.5 hours at Power Line Aid Station (approx. 11 miles) 6.0 hours at Far Out Aid Station (approx. 18.9 miles) 7.0 hours at Last Gasp (approx 22.3 miles) Please do not harass the aid station volunteers to let you continue after the cutoff. The cutoffs are for your safety. We need you and our sweeps off the mountain trails before dark. Furthermore, it will be the discretion of the race director and EMT supervisors to pull a runner from the race if it is determined unsafe for the runner to continue.
Women/Men: Top 3 overall 1st place masters & grandmasters women/men
Oct 18, 2026
Distance — 19.3K
Type — Running
08:00
$60.00
Oct 18, 2026
Distance — 42.2K
Type — Running
08:00
$85.00
These values represent the 3-year monthly averages for October in Chatsworth.
Learn more about the host city, Chatsworth.
Chatsworth is a small town in Georgia's Northwest High Country, near Dalton and Chattanooga.
Read more launchAll-time top performances and historical records for Mystery Mountain Marathon & 12-Miler.
| Place | Name | Year | Time | |
|---|---|---|---|---|
| 🥇 | Dennis Bauer | '08 | 3:34:19 | |
| 🥈 | Malcolm Campbell | '08 | 3:35:28 | |
| 🥉 | Mitchel Pless | '13 | 3:46:59 | |
| 4 | Michael Green | '08 | 3:48:05 | |
| 5 | Benjamin Foote | '22 | 3:54:37 | |
| 6 | Dennis Bauer | '09 | 3:56:38 | |
| 7 | Jason Hanlin | '11 | 3:56:54 | |
| 8 | James Bickelhaupt | '11 | 4:01:05 | |
| 9 | Patrick Chamberlain | '12 | 4:01:49 | |
| 10 | James Bickelhaupt | '10 | 4:04:03 |
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