Run For Breast Cancer 5K/10K/13.1 DENVER/AURORA

Run For Breast Cancer 5K/10K/13.1 DENVER/AURORA takes place in Centennial, Colorado, on December 12, 2026, in support of breast cancer awareness and fundraising. All four events, the half marathon (13.1 miles), the 10K, the 5K and a family one-mile fun run, start at 7:30 a.m. Any age, any ability, run or walk, with timing optional and a virtual entry available. Your registration brings a race shirt, a finisher medal, a towel or gift, a digital training pack and access to local running clubs, shipped straight to participants.

If you are traveling in from lower ground, remember that the Front Range sits around a mile above sea level and your race pace will reflect it; arrive with adjusted expectations rather than a sea-level target. Locals can treat the half as the payoff for a twelve-week block with a weekly long run, while visitors may get more out of the 10K or the 5K. Miles recorded after the event feed additional donations, which is a good reason not to stop on December 13.