RunDenver Series

RunDenver Series 2025-26 is HAL Sports’ Colorado winter running series in Denver, offering five events from December through March. Races take place at City Park and Washington Park with distances including Rudolph Ramble 5K, Polar Bear 5K, SuperBowl 5K, Valentine’s Day 4 Mile, and That Dam Run offering a half marathon (13.1), 10K, and 5K at Cherry Creek Dam Rd & Dayton. The series emphasizes a fun, community atmosphere with sweet swag, epic medals, and playful mascots; virtual options are available so you can still earn swag and compete in the series.

Full-series registrants receive a 1/4 zip fleece; charity partners include Fetal Health Foundation and Colorado Gynecologic Cancer Alliance. Visit the organization's website for the most recent information.