Winterfest 5K at Gateway Arch National Park

Sixth annual Winterfest 5K run/walk through Gateway Arch National Park with views of the Arch and Old Courthouse, plus a 1-mile fun run around the Arch. All ages; finishers get a medal and shirt, and Winterfest opens in Kiener Plaza right after. Registration $20 to $25. Starts 7:30 a.m. Pay the venue directly — HMNTY does not sell tickets for this event.