Support King County Parks. Bring the kids! The Kids Dash is an untimed fun run (roughly a 1/4 mile) designed for children under 12 years old. Kids will chase Bert the Salmon for a chance at dash glory! Bagels, water, sports drink, FUZE beverages, Snoqualmie Ice Cream, energy bars, fruit, and other delectable goodies will be FREE to all entrants. Dogs are as much a part of Marymoor and other King County Parks as trees and grass! Bring Rover for the run or walk. The course consists of five very flat, very fast kilometers encompassing all of Marymoor Park.