RACE PROFILE

RMRR SPRING MARATHON TRAINING SERIES #2

Thornton, Colorado·Marathon

Next Race · Apr 11, 2026

RMRR provides consistent and individualized marathon training opportunities for runners of all abilities. All races in the series are low cost, friendly, fully supported, and officially timed.The first two races, March 29 & April 11, are 10 Mile and 20 Mile races (runners choice for distance). The third race in the series is the Inaugural Blue Heron half marathon. All you need to do is focus on your running! Our races fit perfectly in training schedules for Boston, London, Colfax, and other spri