Blue Heron Half Marathon
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Blue Heron Half & 5K
The Blue Heron Half Marathon and 5K take place on April 26, 2026, at Riverdale Regional Park in Brighton, Colorado. Both races start and finish at Riverdale Regional Park, located across from the Adams County Fairgrounds. Courses are subject to change because of construction along the trail and course maps are provided.
Distances
- Half Marathon
- 5K
Both courses run along the South Platte River and are described as flat and fast. The 5K is roughly half paved and half smooth dirt. The half marathon is mostly flat with about 3.5 miles on smooth dirt; it includes a loop around Mann-Nyholt Lake, a run south to Valente Lake with a 1.2 mile loop there, and a return to the finish with a slight downhill section.
There are three aid stations positioned so runners encounter them multiple times at approximately 0.8, 2.8, 4.25, 7.1, 8.25, 11.1, and 12.5 miles. Bathrooms are available at the start/finish and at mile points near 4.25, 7.1, 8.25, and 11.1. RMRR membership discounts and group registration discounts are offered; RMRR members receive a 50 percent registration discount. Visit the organization's website for the most recent information.
