Mystery Mountain Marathon & 12-Miler
Chatsworth, United States • 18 Oct 2026
Distances
- Marathon (approximately 42.2 km)
- 12 Miler (approximately 19.3 km)
Course Information
Both events are trail races held at Fort Mountain State Park in Chatsworth, Georgia. The course includes single-track trails, rugged mountain bike paths, and smooth horse trails. It traverses the area over and around Fort Mountain. The marathon distance features approximately 5,500 feet of elevation gain. The course passes a historic rock wall near the mountain summit.
Time Limits & Cutoffs
There is a strict cutoff policy for runner safety. The 12 Miler has a 6-hour overall time limit. The Marathon has an 8-hour overall time limit. There are intermediate cutoffs at various aid stations along the marathon course: 3.5 hours at the Park Entrance (approx. 8 miles), 3.5 hours at the Power Line Aid Station (approx. 11 miles), 6.0 hours at the Far Out Aid Station (approx. 18.9 miles), and 7.0 hours at the Last Gasp Aid Station (approx. 22.3 miles).
Awards
Awards are given for the top 3 overall women and men. There are also awards for first-place masters and grandmasters in the women's and men's categories.
Location & Event Details
The event takes place at Fort Mountain State Park, roughly 90 miles north of Atlanta and 50 miles southeast of Chattanooga, Tennessee. Visit the organization's website for the most recent information.