September 29, 2022

The Portland Marathon on Sunday, October 2 will impact traffic on several Willamette River bridges maintained by Multnomah County. 

Broadway Bridge: The bridge will be closed to all motor vehicles, including TriMet buses and Portland Streetcar, from 6:30 a.m. to 9:00 a.m. TriMet’s 17 bus line will detour to the Steel Bridge. Sidewalks will remain open for bicyclists and pedestrians. Drivers can use the Steel or Fremont bridges during the closure. For information on Portland Streetcar service changes, visit

Burnside Bridge: The north sidewalk, bike lane and outside westbound lane will remain closed from 7:30 a.m. to 1:30 p.m. TriMet bus routes 12 and 19 detour to Steel Bridge. Bus route 20 detours to Hawthorne Bridge.

Morrison Bridge: The onramp from SW Naito Parkway, the Morrison Bridge north and south traffic lane and the SE Water Ave ramp will remain closed due to construction. The south shared use path on the bridge will be closed from 12 p.m. to 2 p.m. 

Sellwood Bridge: The north sidewalk and westbound lane will be closed from 6:30 a.m. to 10:45 a.m. The south sidewalk and eastbound lane will remain open. Westbound drivers can use the Ross Island Bridge as an alternate route.

The lift spans of the Broadway and Burnside bridges will not open for river traffic from 6:30 a.m. to 2 p.m.

 Multnomah County maintains the Broadway, Burnside, Morrison and Sellwood bridges as well as 269 miles of roads. For bridge information, visit For TriMet bus reroutes, visit For event information, visit