What contact did Washington tribes have with tribes to the north and east?

Washington tribes, particularly those in the coastal and inland regions, engaged in trade and cultural exchanges with tribes to the north, such as the Coast Salish and the Haida, as well as those to the east, including the Nez Perce and Spokane tribes. These interactions facilitated the sharing of resources, such as fish, game, and crafts, and promoted the exchange of cultural practices and languages. Seasonal migrations, trade routes, and social gatherings helped strengthen these connections. Additionally, intermarriage among tribes often fostered alliances and kinship ties across the regions.