DIRECTIONS The Key Arena Seattle, WA DIRECTIONS The Key Arena located at First Avenue North between Thomas and Republican in Seattle, WA. It is located on the grounds of the Seattle Center, formerly the site of the 1962 World's Fair, in the lower Queen Anne area of Seattle. From Interstate 5: Take the Mercer Street exit from I-5 and follow the brown and white visitor's signs to the Seattle Center. The Key Arena is located on the Northwest corner of the grounds with street access along First Avenue North and cross streets Thomas and Republican. Public parking is available along First Avenue and Fifth Avenue North, Mercer Street, and throughout lower Queen Anne. If you have any further questions, please call us at 1-800-327-6921