This incredibly fast and remarkably beautiful downhill road race takes runners from the forests and canyons of the Rocky Mountains to the foothills of Denver, Colorado. Featuring a perfectly smooth downhill slope and spectacular scenery, this race will be sure to help you set your PR and finally hit that Boston Qualifying time. This event is guaranteed to be your new favorite marathon or half marathon in Colorado! REVEL in speed. REVEL in beauty. REVEL in the Rockies.