RMRR Spring Marathon Training Series

The RMRR Spring Marathon Training Series offers a series of low-cost, timed training races designed for runners of all abilities. Scheduled for March 23, 2025, at Platte River Trailhead Park in Thornton, Colorado, participants can choose from events including a 10-mile race, a 20-mile race, or two-race bundles. These races aim to help runners prepare for major spring marathons, focusing on pace, nutrition, and overall readiness.

The courses are out-and-back, accommodating various distances between 10 and 20 miles. Note that dogs and running strollers are not permitted for safety reasons. Visit the organization's website for the most recent information.