Terwilliger Boulevard

{{Short description|Street in Portland, Oregon, U.S.}}

{{Use mdy dates|date=April 2025}}

{{Infobox street

| name = Terwilliger Boulevard

| marker_image =

| image = Southwest Terwilliger Boulevard at Duniway Park overlook - Portland, Oregon.JPG

| caption = Terwilliger Boulevard at Duniway Park overlook

| length_mi = 7.4

| length_ref =

| location = Portland, Oregon, United States

| maint = City of Portland

| direction_a = North

| terminus_a = Southwest 6th Avenue

| direction_b = South

| terminus_b = Oregon State Route 43

| construction_start_date =

| completion_date =

}}

Terwilliger Boulevard is a street in Portland, Oregon, U.S. It begins at SW 6th Avenue and SW Sheridan Street south of Portland State University. It passes through the neighborhoods of Marquam Hill, Southwest Hills, and Burlingame and by Lewis and Clark College before ending at Oregon Route 43 in Lake Oswego. For portions of its route, it is a traditional parkway through Duniway and Marquam Parks. The land surrounding Terwilliger Boulevard is heavily wooded in nature.

The road was first planned for use as a pleasure parkway in the 1903 park plan prepared by the Olmsted Brothers. The parkway was completed in 1915. It is named for James Terwilliger, who owned the land on which the parkway was built.{{cite web|url=http://www.portlandonline.com/parks/finder/index.cfm?PropertyID=793&action=ViewPark|title=Portland Parks and Recreation|accessdate= 2011-07-19}} The roadway, or portions of it, were listed on the National Register of Historic Places in 2021.{{cite web |url=https://www.nps.gov/subjects/nationalregister/weekly-list-2021-03-05.htm |title=Weekly list of actions taken on properties: 2/4/2021 through 3/5/2021 |date=March 5, 2021 |work=National Register of Historic Places Program: Weekly List |publisher=National Park Service |access-date=2021-04-12}}

It is the namesake of the Terwilliger curves, one of the most dangerous stretches of I-5 in Oregon,{{cite news |title=Commuters' nightmare |last1=Lednicer |first1=Lisa Grace |url=http://apps.itd.idaho.gov/Apps/MediaManagerMVC/NewsClipping.aspx/Preview/6424 |newspaper=The Oregonian |date=February 22, 2005 |accessdate=July 14, 2013}} and possibly also The Simpsons character Robert Terwilliger / Sideshow Bob.{{cite web|url=http://www.hulu.com/the-simpsons-anniversary-special-in-3-d-on-ice |title=The Simpsons 20th Anniversary Special |accessdate=2010-01-25 |date=2010-01-10 |url-status=dead |archiveurl=https://web.archive.org/web/20100123010329/http://www.hulu.com/the-simpsons-anniversary-special-in-3-d-on-ice |archivedate=January 23, 2010 }}