Big Backyard 5K
The Big Backyard 5K s a dog and stroller friendly 5k run/walk event benefiting King County Parks.
Expect a great day out with 1,000+ runners following a fast and flat course around King County’s Marymoor Park. Stick around after the run for another epic Kid’s Dash, refreshing drinks, tasty foods and awards.
The course is flat, chip-timed and perfect for a PR.