RMRR Spring Marathon Training Series #2

Lace up your shoes for the RMRR Spring Marathon Training Series #2 on Saturday, April 11, 2026, in Thornton, CO. This popular event is meticulously designed to support runners training for spring marathons like Boston, Colorado, Colfax, and London, offering both 10-mile and 20-mile distances. The series is renowned for its low-cost, friendly, and supportive atmosphere, providing an ideal environment to refine your pace, nutrition, and overall race strategy.

The out-n-back course unfolds along the scenic Platte River Trail, known for its clear markings and mile markers to help you track your progress. Participants will find well-stocked aid stations providing water, sports drinks, and gels to keep you fueled. Starting promptly at 8 AM MDT from the Platte River Trailhead Park at 88th and Colorado, this event provides a professionally timed experience. Typical race day conditions in early April offer pleasant weather, with highs around 64°F and lows around 34°F, and only a 7% chance of precipitation.

Whether you're tackling the full 10M or 20M, or opting for a custom training distance in between, the RMRR Spring Marathon Training Series #2 is tailored to your needs. This supportive community focuses on helping you achieve your marathon goals in a low-pressure, well-organized setting. Please note, for the safety of all participants, dogs and running strollers are not permitted on the course.