Colfax Marathon – Beat the Price Increase

On October 16-17, come to the Mile High City and celebrate the 15th running of Denver Colfax Marathon! This is the largest running weekend in the Rockies and includes a Marathon, Half Marathon, Urban 10 Miler, Marathon Relay and 5K. COLFAX MARATHON – BRONCOS IMPACT: With the Broncos

Run the Rocks 15th Anniversary on October 10!

You are invited to join us for this year's 15th annual Run the Rocks at Red Rocks Park and Amphitheatre. We've re-imagined the race course but kept the amazing views and challenging hills that have made this 5K and 10K so popular with athletes and weekend warriors alike. That is why The Denver