TriMet (Tri-County Metropolitan Transportation District) provides local and regional transit in the Portland metropolitan area, covering parts of Multnomah County, Clackamas County (Clackamas, Oregon City, Happy Valley, Lake Oswego, Milwaukie, West Linn), and Washington County.
- Bus routes
- MAX Light Rail
- Blue Line Hillsboro - City Center - Gresham
- Red Line Beaverton - City Center - Airport
- Yellow Line Expo Center - City Center - PSU
- Green Line Clackamas - City Center - PSU
- WES Commuter Rail