Marathon at the MAC
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Marathon At The MAC - November 7, 2026
Marathon At The MAC is a trail race in Castle Rock, Colorado, held on November 7, 2026. The event takes place at the Miller Activity Center and uses the park’s extensive trail network through valleys, hills, and open space.
Distances
- Marathon
- Half Marathon
- 5K
The courses include single-track trails, rolling terrain, and sweeping views of the surrounding landscape. The park trail network winds through valleys and hills, creating variable footing and scenery for each distance.
The start and finish are located at the Miller Activity Center, 1375 W Plum Creek Pkwy, Castle Rock, CO 80109. Parking is described as plentiful.
Aid stations and on-course support include two stations: the start/finish and two on-course locations at approximately 4.15 and 8.25 miles. Provided items include water or Skratch, chips, cookies, bananas, vegetable soup or broth, assorted salty and sweet snacks, and sandwiches at the start/finish. The event is cup-less; participants are asked to bring their own cup or bottle. A reusable cup is available for purchase at packet pickup for $5.
Packet pickup is scheduled for Friday, November 6 (4:30–6:30 PM, location TBD) and on event day (7:30–9:15 AM). Marathon entrants are subject to a 10 hour course cutoff. Discounts are available for Colorado students, teachers, first responders, active duty military, and veterans. Visit the organization's website for the most recent information.
