About Big Backyard 5K Presented by Group Health

Runners sprint along the gravel and dirt paths that snake through Marymoor Park, picking up speed near the finish line for a shot at a higher finishing spot. This is the Big Backyard 5K Presented by Group Health, a non-profit health care system that serves residents of Washington and northern Idaho. Unlike most 5Ks or surgeons’ washing stations, the Big Backyard 5K allows dogs, even keeping four-legged participants in high spirits with water and goodies. Following the race, runners and walkers convene in the park for the awards ceremony and after-party complete with healthy, kid-friendly snacks and beverages. Proceeds from the 5K benefit King County Parks and its projects.