Run Against Breast Cancer 5k/10k/13.1 Seattle

Join us for the empowering Run Against Breast Cancer event in Seattle, King County, hosted by The Best Races on October 18, 2025. Lace up for a meaningful day of running, with options to conquer a 5K, 10K, or half marathon (13.1 miles) as we unite to combat breast cancer. This event is a vibrant blend of community spirit, hope, and resilience, where participants of all ages and abilities can contribute to raising awareness and funds for those impacted by breast cancer. Enjoy a stress-free experience, track your progress at your own pace, connect with local running clubs, and receive an impressive swag bag featuring a running t-shirt, finisher's medal, and a digital training pack. Whether you join in-person or virtually, you'll be part of a movement striving for a future free from breast cancer. Secure your spot now and be a part of this impactful cause!