That Dam Run Half Marathon
Always double-check with the organizer's website! This page may contain affiliate links.
RunDenver Series
The RunDenver Series is a five-event winter running series produced by HAL Sports. It has been held for more than three decades and includes a mix of 5K, 4-mile, and longer distance events across Denver-area parks. The series events and dates listed are: Rudolph Ramble 5K (December 7, 2025) at City Park; Polar Bear 5K (January 18, 2026) at Washington Park; Super Bowl 5K (February 1, 2026) at Washington Park; Valentine's Day 4 Mile (February 8, 2026) at Washington Park; and That Dam Run (March 1, 2026) at Cherry Creek Dam Road.
A free kids fun run of approximately 200 meters is offered at every RunDenver Series event. Common event features shown across the series include free event photos, custom finisher medals, themed or event shirts and swag items, and themed mascot or character appearances.
That Dam Run (March 1, 2026)
That Dam Run takes place at Cherry Creek Dam Road / Cherry Creek State Park and offers the following race distances:
- 13.1M (half marathon)
- 10K
- 5K
Event highlights for That Dam Run include an event shirt or tank option, a free 200-meter kids fun run, free photos, post-race refreshments, a post-race celebration with event and series awards, and a custom finisher medal for all distances. The half marathon has a 3.5-hour course limit (16 min/mile pace). Advance packet pickup is scheduled at Road Runner Sports in Lone Tree on February 28. Registration fees for each distance are listed by category and date ranges on the event page. Visit the organization's website for the most recent information.