The Willamette Shore Trolley is a heritage railroad or heritage streetcar that operates along the west bank of the Willamette River between Portland and Lake Oswego in the U.S. state of Oregon. The right-of-way is owned by a group of local-area governments who purchased it in 1988 in order to preserve it for potential future rail transit. Streetcar excursion service began operating on a trial basis in 1987, lasting about three months, and regular operation on a long-term basis began in 1990. The Oregon Electric Railway Historical Society has been the line's operator since 1995.

Lake Oswego is a city in the U.S. state of Oregon, primarily in Clackamas County, with small portions extending into neighboring Multnomah and Washington counties. Population in 2020 was 40,731, a 11.2% increase since 2010, making it the 11th most populous city in Oregon. Located about 7 miles (11 km) south of Portland and surrounding the 405-acre (164 ha) Oswego Lake, the town was founded in 1847 and incorporated as Oswego in 1910. The city was the hub of Oregon's brief iron industry in the late 19th century, and is today a suburb of Portland.