Interstate 405 North

Traveling beneath U.S. 26 and the Ross Island Bridge, I-405 initially follows the original Harbor Drive freeway spur from I-5 north. Harbor Drive connected to the Portland city center until 1974 when it was removed as a river side expressway north of Market Street.⁴

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Left Exit 1A continues SW Harbor Drive north as an at-grade boulevard to SW Naito Parkway and the National Historic District of Portland. Stadium Freeway continues I-405 around the west side of City Center.

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S Harbor Drive ties into SW Naito Parkway opposite the couplet of SW Clay Street and SW Market Street in City Center. SW Naito Parkway originates in the Homestead neighborhood, traveling north between Waterfront Park and downtown. OR 99W previously overlaid a portion of SW Naito Parkway.

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I-405 angles northwest along the Stadium Freeway as I-5 curves northeast on the Marquam Bridge across the Willamette River to East Portland.

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The next two successive off-ramps join I-405 (Stadium Freeway) north with SW 4th Avenue (Exit 1 B) and SW 6th Avenue (Exit 1 C) to Keller Auditorium and Portland State University.

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SW 4th Avenue leads northeast from SW Barbur Boulevard and I-405 along the Portland street grid to Pioneer Place shopping mall between SW Taylor Street and SW Alder Street. Historically, former U.S. 99W followed a portion of both SW 4th and 6th Avenues in downtown prior to realignment in 1950.¹

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Exit 1 B leaves for SW 4th Avenue ahead of the departure for SW 6th Street (Exit 1 C). U.S. 26 west joins the Stadium Freeway from SW 6th Avenue only to leave at Exit 1 D along Sunset Highway to Beaverton in one quarter mile.

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SW 6th Avenue (Exit 1 C) travels northeast from Interstate 405 through the heart of Portland State University. U.S. 26 joins I-405 and Portland with northwest Portland neighborhoods and the city of Beaverton. The U.S. highway was shifted onto a brief portion of Stadium Freeway in 2005².

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Exit 1 D also connects to SW 12 Avenue north to western reaches of City Center. This overhead was replaced after 2007 with an advance sign for SW 12th Avenue.

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Passing under SW Park Avenue, an auxiliary lane briefly joins I-405 north as U.S. 26 enters from SW 6th Avenue. U.S. 26 west departs next for Sunset Highway, a freeway linking I-405 with the Oregon Zoo and World Forestry Center en route to Beaverton.

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A two lane ramp leaves at Exit 1 D for U.S. 26 west to the Oregon coast and SW 12th Avenue north. Providence Park stadium is located four blocks west of I-405 at Exit 2 A to SW 14 Avenue / SW Salmon Street next.

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Leaving I-405 (Stadium Freeway) and downtown, U.S. 26 advances 73.8 miles to its conclusion at U.S. 101 south of Seaside. Locally, U.S. 26 travels along the freeway portion of Sunset Highway through the Vista Ridge Tunnel en route to western suburbs of Portland.

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Stadium Freeway turns northeast at SW Montgomery Street to run between SW 13th and 14th Avenues along the Portland street grid. Upcoming Exit 2 A to SW Salmon Street serves both the Oregon History and Portland Art Museums.

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The couplet of SW Market and Clay Streets tie into the exchange between I-405 / U.S. 26 from City Center as Exit 2 A departs for SW 14th Avenue to SW Salmon Street. The couplet was formerly part of U.S. 26 prior to completion of the Vista Ridge Tunnels in 1970.
One mile separates Stadium Freeway from U.S. 30 west to Northwest Portland and St. Johns.

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Interstate 405 travels under SW Jefferson Street as Stadium Freeway advances northeast to NW 14th Avenue to NW Everett Street (Exit 2 B). Located in the Lloyd District across the Willamette River, the Rose Quarter is home to the Portland Trailblazers NBA team.

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NW Everett Street travels east from the Northwest District / Nob Hill area to the Pearl District east of the Stadium Freeway. NW 14th Avenue connects with NW Glisan Street west two blocks north of NW Everett Street.

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Passing underneath NW Alder Street in advance of Exit 2 B (NW 14th Avenue). Stadium Freeway meets Interstate 5 north to Vancouver, Washington in two miles. I-5 leads north through the Evergreen State to Tacoma and Seattle.

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Interstate 405 (Stadium Freeway) shifts north under W Burnside Street at the off-ramp to NW 14th Avenue to NW Everett Street (Exit 2 B). NW 14th Street advances north through the Pearl District to its end at NW 15th Avenue under the Fremont Bridge.

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I-405 transitions to an elevated viaduct beyond NW Glisan Street as the freeway lines the western limits of the Pearl District. U.S. 30 east joins Stadium Freeway in one half mile from St Helens and Northwest Portland (Left Exit 3).

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A second ramp joins Interstate 405 (Stadium Freeway) north from 15th Avenue / Glisan Street. Exit 3 leaves in one quarter mile for U.S. 30 west to St. Helens and Astoria. U.S. 30 initially follows a freeway that was intended for Interstate 505.

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Entering the directional interchange with U.S. 30 (Lower Columbia River Highway) on the Fremont Bridge approach of Interstate 405 north. Had Interstate 505 been completed as planned, the freeway would have stretched 1.44 miles between the Fremont Bridge and St. Helens Road (old U.S. 30). Cancellation of the route occurred in 1979 with U.S. 30 later shifting to its own freeway to Yeon Avenue at Nicolai Street by 1988.³

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Exit 3 leaves Interstate 405 as the freeway turns north onto the Fremont Bridge. The tied-arch bridge opened on November 15, 1973, completing the 4.25 mile freeway loop.⁴

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U.S. 30 follows the Columbia River for most of its 98.5 mile course between Interstate 405 and U.S. 101 at Astoria. Yeon Avenue carries the route from the freeway end to St. Helens Road through the Northwest Industrial Area.

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Northbound travelers of the Fremont Bridge utilize the lower deck of the double-decker freeway.

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Interstate 405 north & U.S. 30 span the Willamette River and quickly approach an elevated stack interchange with Interstate 5 and the Kerby Avenue connector.

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Cresting above the Willamette River along Interstate 405 north & U.S. 30 east on the Fremont Bridge. The bridge totals 2,154 feet in length and provides a vertical clearance of 175 feet above the river.⁴

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A single lane ramp continues U.S. 30 east onto Interstate 5 south from Interstate 405 north at the Fremont Bridge end. U.S. 30 utilizes Interstate 5 south one mile to Interstate 84 (Banfield Expressway) east.

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Interstate 405 defaults onto Interstate 5 north beyond the split with U.S. 30 east. The U.S. 30 ramp onto Interstate 5 utilizes The Dalles as the control city for the continuation of the US highway along Interstate 84 east along the Columbia River.

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Two lanes continue onto Interstate 5 north through the Humbolt and Kenton areas of north Portland. Interstate 5 joins Portland with Vancouver, Olympia, and Seattle-Tacoma in Washington.
The right lane meanwhile continues the Stadium Freeway northeast to Kerby Avenue at Gantenbein Avenue. Intended to continue northeast to the unconstructed Prescott Freeway as the Rose City Freeway, the freeway now provides local access to the Boise section of the city and Martin Luther King Jr., Boulevard (former OR 99E).

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The northbound ramp to Interstate 5 emerges between the southbound ramps from Interstate 5 and Kerby Avenue.

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A ramp stub on the southbound ramp to Interstate 405 & U.S. 30 west was intended to connect with the Rose City Freeway north.

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