The Portland Metropolitan Exposition Center, usually referred to as the Expo Center, is a convention center located in the Kenton neighborhood of Portland, Oregon. Opened in the early 1920s as a livestock exhibition and auction facility, the Expo Center now hosts over 100 events a year, including green consumer shows, trade shows, conventions, meetings and other special events. Located on the north side of Portland near Vancouver, Washington, it includes the northern terminus for the Yellow Line of Portland's light-rail transit system and has connecttions to Trimet Bus Line 11-Rivergate/Marie Dr