MAX Light Rail (for Metropolitan Area Express) is a light rail system in Portland, Oregon, United States, that is owned and operated by TriMet. The system is 59.7 miles (96.1 km) long, consists of 94 stations, and is served by five color-designated lines. It operates in Oregon's Clackamas, Multnomah, and Washington counties, connecting all six sections of Portland; the communities of Beaverton, Clackamas, Gresham, Hillsboro, and Milwaukie; and Portland International Airport to Portland City Center. As of 2018, MAX is the fourth-busiest light rail system in the United States after comparable light rail services in Los Angeles, Boston, and San Francisco. The system had an average daily ridership of 120,900 and nearly 39 million annual riders in 2019. Lines run seven days a week with headways of between 30 minutes off-peak and three minutes during rush hours.