European exploration of the Pacific Northwest began in the late 16th century, driven by the search for the Northwest Passage and valuable resources. Spanish, Russian, British, and American explorers mapped the coast, established trading posts, and encountered indigenous peoples, forever changing the region's dynamics. These early interactions laid the foundation for Washington's modern political and cultural landscape. The fur trade, missionary activities, and territorial disputes shaped relationships between Europeans and native tribes, leading to treaties, reservations, and lasting impacts on indigenous communities.