Back for its fourth year, The Goblin Gallop has become a Halloween tradition on the Eastside. The non-competitive 5K is fun for the whole family, and includes a free kids dash (1/2 mile) and a toddler trot (1/4 mile). After galloping through BOO-tiful Marymoor Park, stick around for a terrorific Halloween bash—complete with live music, a costume contest and trick-or-treating.