Snohomish County was originally inhabited by several Coast Salish groups, predominantly settled along the western coastline and near the region's rivers. The Snohomish were the largest group and occupied an area from present-day Warm Beach to Shoreline, while Stillaguamish lived in the Stillaguamish River basin. The region was first charted and named by European explorers in the late 18th century, beginning with Captain George Vancouver and his British expedition. Vancouver arrived in Puget Sound and Port Gardner Bay on June 4, 1792, landing near present-day Everett.