Patos Island State Park is a 207-acre marine park with 20,000 feet of saltwater shoreline. The island is owned by the federal government and is administered by the Bureau of Land Management’s Wenatchee Office. The Washington State Parks and Recreation Commission operates a small campground facility at Active Cove near the west side of the island, maintains a 1.5 mile loop trail and has two offshore mooring bouys. Archaeological sites indicate Native Americans used the island for thousands of years as a shellfish harvesting site. Europeans first discovered the island during the late 1700s when the Spanish Elisa Expedition surveyed the area. The island was named Patos Island which is Spanish for duck.