RMRR Spring Marathon Training Series

The RMRR Spring Marathon Training Series offers a supportive environment for runners of all abilities to prepare for upcoming marathons. Scheduled for March 30, 2025, at Platte River Trailhead Park in Thornton, Colorado, the series features events including a 10-mile race, a 20-mile race, and two race bundles. These low-cost, timed training races are designed to help participants refine their pacing, nutrition, and overall race readiness.

The courses are out-and-back, accommodating various distances between 10 and 20 miles, ensuring a comprehensive training experience for all runners. Visit the organization's website for the most recent information.