- Clark County — Thumbnail History (historylink.org)
Local history buffs call Clark County the “Cradle of Pacific Northwest History,” reflecting the importance of the 628-square-mile southwestern Washington county as the scene of key historical developments. Here the Lewis and Clark expedition arrived in 1805, the British Hudson’s Bay Company established Fort Vancouver in 1825, and the town of Vancouver was incorporated in 1857. The county’s location first made it an entrepôt (trading center), then an agricultural area. The region developed in agriculture, lumber, and fishing, and later in shipbuilding and aluminum. In recent times, energy from hydroelectric projects on the Lewis and Columbia rivers has fueled development as a manufacturing center.
northbound on Interstate 5
- Moscow, Idaho (Wikipedia)
Moscow (/ˈmɒskoʊ/ MOSS-koh) is a city and the county seat of Latah County, Idaho. Located in the North Central region of the state along the border with Washington, it had a population of 25,435 at the 2020 census. Moscow is the home of the University of Idaho, the state’s land-grant institution and primary research university.
southbound on Interstate 5
- Clark County, Washington (Wikipedia)
Clark County is the southernmost county in the U.S. state of Washington. As of the 2020 census, the population was 503,311, making it Washington’s fifth-most populous county. Its county seat and largest city is Vancouver. It was the first county in Washington, first named Vancouver County in 1845 before being renamed for William Clark of the Lewis and Clark Expedition in 1849. It was created by the Provisional Government of Oregon in Oregon Country on August 20, 1845, and at that time covered the entire present-day state. Clark County is the third-most-populous county in the Portland-Vancouver-Hillsboro Metropolitan Statistical Area, and is across the Columbia River from Portland, Oregon.
