Naval Outlying Landing Field Coupeville

Keystone is a small unincorporated community on Whidbey Island in Island County, Washington, in the northwestern United States. It is near the Keystone ferry landing, a dock at Keystone Harbor for the Washington State Ferries' Coupeville to Port Townsend route. The route provides a maritime link for State Route 20 across Admiralty Inlet to the Olympic Peninsula. Since its establishment in the 1930s, the ferry route to Port Townsend was known as the Keystone-Port Townsend Ferry; the name was changed in 2010 at the suggestion of the Central Whidbey Chamber of Commerce in order to avoid confusion from tourists and visitors to Whidbey Island.Keystone is located about four miles south of Coupeville, next to Fort Casey State Park, Camp Casey, and is two miles from Ebey's Prairie National Historic Preserve. There is a residential area and farms in Keystone, including the historic Crockett Barn located next to the Crockett Blockhouse and Crockett Lake. Currently, the only business in Keystone is Callen's Restaurant, located directly across Highway 20 from the ferry landing and boat launch parking area.

Whidbey Island (historical spellings Whidby, Whitbey, or Whitby) is the largest of the islands composing Island County, Washington, in the United States, and the largest island in Washington state. Whidbey is about 30 miles (48 km) north of Seattle, and lies between the Olympic Peninsula and the I-5 corridor of western Washington. The island forms the northern boundary of Puget Sound. It is home to Naval Air Station Whidbey Island. The state parks and natural forests are home to numerous old growth trees. According to the 2000 census, Whidbey Island was home to 67,000 residents with an estimated 29,000 of those living in rural locations. This increased slightly to 69,480 residents as of the 2010 census.Whidbey Island is approximately 37 miles (60 km) from north to south, and 1.5 to 10 miles (2.4 to 16.1 km) wide, with a total land area of 168.67 square miles (436.9 km2), making it the 40th largest island in the United States. It is ranked as the fourth longest and fourth largest island in the contiguous United States, behind Long Island, New York; Padre Island, Texas (the world's longest barrier island); and Isle Royale, Michigan. In the state of Washington, it is the largest island, followed by Orcas Island.

Crockett Lake is a lake in Island County, Washington at an elevation of 0 feet (0 m).The Crockett family homesteaded the site in the 1850s, and gave the lake their name.

Fort Casey State Park is located on Whidbey Island, in Island County, Washington state. It is a Washington state park and a historic district within the U.S. Ebey's Landing National Historical Reserve. Admiralty Inlet was considered so strategic to the defense of Puget Sound in the 1890s that three forts—Fort Casey on Whidbey Island, Fort Flagler on Marrowstone Island, and Fort Worden at Port Townsend—were built with the intention to create a "triangle of fire" against invading ships. This military strategy was based on the theory that the three fortresses would thwart any invasion attempt by sea.

The Admiralty Head Light is a deactivated aid to navigation located on Whidbey Island near Coupeville, Island County, Washington, on the grounds of Fort Casey State Park. The restored lighthouse overlooks Admiralty Inlet. It was the companion to the Point Wilson Light, which sits four miles away on Admiralty Inlet's western shore.

Ebey's Landing National Historical Reserve is a unit of the National Park Service on Whidbey Island in the Puget Sound, near Coupeville in Island County, Washington, United States.

Coupeville is a town on Whidbey Island, in Island County, Washington, United States. It is the county seat of Island County. The population was 1,831 at the 2010 census.

Island County is a county located in the U.S. state of Washington. As of the 2020 census, its population was 86,857. Its county seat is Coupeville, while its largest city is Oak Harbor. The county's name reflects the fact that it is composed entirely of islands. It contains two large islands, Whidbey and Camano, and seven smaller islands (Baby, Ben Ure, Deception, Kalamut, Minor, Smith, and Strawberry). Island County was created out of Thurston County on December 22, 1852, by the legislature of Oregon Territory, and is the eighth-oldest county in Washington. It originally encompassed what are now Snohomish, Skagit, Whatcom, and San Juan Counties. Island County comprises the Oak Harbor, Washington Micropolitan Statistical Area, which is also included in the Seattle–Tacoma, WA Combined Statistical Area.

The Coupeville grain wharf is a wharf built in 1905 in Coupeville, Washington. It was formerly used for exporting grain produced on Whidbey Island. It is a contributing property to the Central Whidbey Island Historic District, registered on the National Register of Historic Places in 1973.

Admiralty Inlet Natural Area Preserve in Island County, Washington is part of the Washington Natural Areas Program. It lies along Admiralty Inlet within Ebey's Landing National Historical Reserve on land owned by the Whidbey Camano Land Trust with a conservation easement owned by the Washington Department of Natural Resources. Admiralty Inlet NAP is home to one of only 11 remaining populations of golden paintbrush, a flowering plant listed as threatened under the Endangered Species Act. The preserve's 46 acres (19 ha) includes old-growth forest, a rare remnant prairie, and shoreline.The Whidbey Camano Land Trust purchased the site from Seattle Pacific University for $3.3 million in June 2013.

Lake Hancock is a 200-acre (81 ha) coastal lagoon (and estuary) and former lake on Whidbey Island in the U.S. state of Washington. The elevation reported by United States Geological Survey is 3 feet (0.91 m). According to some conservationists, it is "the most well preserved estuary on the island". It was a U.S. Navy bombing range between 1943 and 1971, and legally is part of Naval Air Station Whidbey Island. The lake is in Greenbank, Washington about halfway down the length of 55-mile long Whidbey Island and nearly bisects it; the lake has contacted Admiralty Inlet on the island's west side since 1934, and from the east shore of the lake to Saratoga Passage on the east shore of the island near Greenbank Farm is less than one mile. Washington State Route 525 runs about 500 feet (150 m) from the lake's eastern shore, down the narrow strip between the two bodies of water.The area is designated by Washington State Department of Ecology as the "Lake Hancock Munitions Response Site". In 2006, 120 tons of contaminated material including creosote coated logs was removed by helicopter from the lake. The Navy held public hearings in 2016 to determine if further cleanup of unexploded material should be undertaken.

Admiralty Inlet is a strait in the U.S. state of Washington connecting the eastern end of the Strait of Juan de Fuca to Puget Sound. It lies between Whidbey Island and the northeastern part of the Olympic Peninsula.