San Juan Islands (USA)
San Juan Islands, archipelago of more than 170 islands composing San Juan county, northwestern Washington, U.S. The islands are part of a submerged mountain chain in upper Puget Sound near the Canadian border, south of the Strait of Georgia and east of Juan. The islands were explored (1790–92) and named by the Spanish Francisco Eliza expedition. The main islands (including Orcas, San Juan, and Lopez)
