Big Backyard 5K Sun June 4 @ 8:00 am - 11:00 am $30 – $45 Annual 5K run/walk at King County’s Marymoor Park in Redmond WA to support King County Parks. Bring your friends, kids and 4-legged running buddy! 5K Pacific Northwest : Running Register Location Redmond, Washington Redmond, WA 98008 United States + Google Map