The Westside Express Service (WES) is a commuter rail line serving parts of the Portland metropolitan area's Washington and Clackamas counties in the U.S. state of Oregon. Owned by TriMet and operated by Portland & Western Railroad (P&W), it travels 14.7 miles (23.7 km) between Beaverton and Wilsonville along a route just west of Oregon Highway 217 and Interstate 5 (I-5). The line serves five stations and connects with MAX Light Rail at Beaverton Transit Center. Service operates on a 45-minute headway on weekdays during the morning and evening rush hours. In spring 2022, WES saw a daily ridership of 420 passengers or about 109,000 riders annually.