Olympia is the capital of the U.S. state of Washington and the county seat and second-largest city of Thurston County. It is 60 miles (100 km) southwest of Seattle, the state's most populous city, and is a cultural center of the southern Puget Sound region. European settlers claimed the area in 1846, with the Treaty of Medicine Creek initiated in 1854, followed by the Treaty of Olympia in 1856. Olympia was incorporated as a town on January 28, 1859, and as a city in 1882. It had a population of 46,479 at the 2010 census, making it the state's 24th-largest city. Olympia borders Lacey to the east and Tumwater to the south.

The Long Beach Peninsula is an arm of land on the southern coast of the state of Washington in the United States. Entirely within Pacific County, it is bounded on the west by the Pacific Ocean, the south by the Columbia River, and the east by Willapa Bay. Leadbetter Point State Park and Willapa National Wildlife Refuge are at the northern end of the peninsula and Cape Disappointment is at the southern end, with Pacific Pines State Park located in between. Cape Disappointment State Park west of Ilwaco, part of the Lewis and Clark National Historical Park, was the westernmost terminus for the Lewis and Clark Expedition. A monument designed by Maya Lin as part of the Confluence Project was dedicated there in 2005. The Long Beach Peninsula is known for its continuous sand beach 28 miles (45 km) in extent on the Pacific Ocean side, claimed to be the longest beach in the United States. It is a popular vacation destination for people from Seattle, Washington (165 miles (266 km) distant) and Portland, Oregon (115 miles (185 km) distant).

Jefferson County is a county located in the U.S. state of Washington. As of the 2020 census, the population was 32,977. The county seat and only incorporated city is Port Townsend. The county is named for Thomas Jefferson.Jefferson County was formed out of Thurston County on December 22, 1852, by the legislature of Oregon Territory, and included the northern 4,854 square miles (12,571.8 km2) portion of the Olympic Peninsula. On April 26, 1854, the legislature of Washington Territory created Clallam County from the northwestern 2,670 square miles (6,915.3 km2) portion of this original area. The Hood Canal Bridge connects Jefferson County to Kitsap County, Washington. The Coupeville-Port Townsend route of the Washington State Ferries connects the county to Whidbey Island in Island County, Washington.

Astoria is a port city and the seat of Clatsop County, Oregon, United States. Founded in 1811, Astoria is the oldest city in the state of Oregon and was the first American settlement west of the Rocky Mountains. The county is the northwest corner of Oregon, and Astoria is located on the south shore of the Columbia River, where the river flows into the Pacific Ocean. The city is named for John Jacob Astor, an investor and entrepreneur from New York City, whose American Fur Company founded Fort Astoria at the site and established a monopoly in the fur trade in the early nineteenth century. Astoria was incorporated by the Oregon Legislative Assembly on October 20, 1876.The city is served by the deepwater Port of Astoria. Transportation includes the Astoria Regional Airport. U.S. Route 30 and U.S. Route 101 are the main highways, and the 4.1-mile (6.6 km) Astoria–Megler Bridge connects to neighboring Washington across the river. The population was 9,477 at the 2010 census.