Downeast Airlines Flight 46

Muscle Ridge Islands is an archipelago and unorganized territory off the coast of South Thomaston in Knox County, Maine, United States. The population was 9 at the 2020 census.

Knox County is a county located in the state of Maine, United States. As of the 2020 census, the population was 40,607. Its county seat is Rockland. The county is named for Revolutionary War general and Secretary of War Henry Knox, who lived in the county from 1795 until his death in 1806. The county was established on April 1, 1860, and is the most recent county to be created in Maine. It was carved from parts of Waldo and Lincoln counties. The Union Fair, started in 1868, began as the efforts of the North Knox Agricultural and Horticultural Society.

Birch Point State Park is a public recreation area occupying 62 acres (25 ha) on Penobscot Bay in the town of Owls Head, Knox County, Maine. The state park features a sandy, crescent-shaped "pocket beach" with scenic views of the Muscle Ridge Islands dotting Muscle Ridge Channel. The park is managed by the Maine Department of Agriculture, Conservation and Forestry.

The Weskeag River is a short tidal river in Knox County, Maine. The Abenaki Indians called it Wessaweskeag, meaning "tidal creek" or "salt creek". From its source (44°04′13″N 69°09′38″W) in South Thomaston, the river runs 1.2 miles (1.9 km) northeast and southeast to its confluence with Marsh Creek, then 4.2 miles (6.8 km) southeast through its estuary to the Muscle Ridge Channel of West Penobscot Bay. Its mouth is on the border between the towns of South Thomaston and Owls Head.

Knox County Regional Airport (IATA: RKD, ICAO: KRKD, FAA LID: RKD) is a county-owned, public-use airport in the town of Owls Head, Knox County, Maine, United States. It is located three nautical miles (6 km) south of the central business district of Rockland, Maine. The airport serves the residents of midcoast Maine with commercial and charter aviation services. Scheduled airline service is subsidized by the Essential Air Service program. It is also a major hub of freight and mail service to Maine's island communities including Matinicus, North Haven and Vinalhaven. As per Federal Aviation Administration records, the airport had 13,866 passenger boardings (enplanements) in calendar year 2008, 14,461 enplanements in 2009, and 17,657 in 2010. It is included in the National Plan of Integrated Airport Systems for 2011–2015, which categorized it as a primary commercial service airport (more than 10,000 enplanements per year).During the summer months, the airport is one of Maine's busiest, with significant private jet operations bringing visitors to the numerous summer colonies in the Penobscot Bay region. The influx in traffic in recent years prompted the implementation of a voluntary night curfew on arrivals and departures between 10:30 p.m. and 6:00 a.m. Owls Head Transportation Museum is also situated at the airport on the remains of runway 17/35, a third runway that is now abandoned. It has a museum of antique autos, aircraft, and engines. During the summer special event gatherings are held for enthusiasts.

Two Bush Island Light is a lighthouse on Two Bush Island, on the channel of the same name, the southwestern entrance to Penobscot Bay, Maine, United States. The two bushes for which the island was named have long since vanished. The lighthouse was established in 1897. The keepers were removed when the light was automated in 1964. Afterward, the Two Bush Island fog signal was operated by the keepers at nearby Whitehead Light Station, who also monitored the light. The keeper's house was destroyed in 1970 as a Green Beret demolition exercise. In the summer of 2000, the light was converted to solar power. The lighthouse itself continues to be a navigation aid, but is only visible by boat or from the air. In 1998, the lighthouse became the property of the U.S. Fish and Wildlife Service.

Owls Head is a town in Knox County, Maine, United States. The population was 1,504 at the 2020 census. A resort and fishing area, the community is home to the Knox County Regional Airport. It includes the village of Ash Point.

The George Thorndike House is a historic house in Maine State Route 73 in South Thomaston, Maine. Built in 1855, it is one of the region's finest examples of Italianate architecture, its design attributed to Thomaston native Benjamin S. Deane. It was listed on the National Register of Historic Places in 1983.

Spruce Head is an unincorporated village in Knox County, Maine, United States. The community is located on Penobscot Bay and Maine State Route 73 6.5 miles (10.5 km) south of Rockland. Spruce Head has a post office with ZIP code 04859, which opened on March 4, 1880.The village of Spruce Head lies partly in the township of South Thomaston and partly in the township of St. George and is connected by a bridge to Sprucehead Island, which is entirely within the borders of South Thomaston. The island faces the Muscle Ridge Islands to the east across a channel. Seal Harbor is a well-protected anchorage formed by the southern shore of Sprucehead Island, the eastern shores of Patten Point and Rackliff Island, and the northern shores of Norton Island and Whitehead Island. Spruce Head village centers on the post office, Spruce Head Community Church (built in the late 19th century), and the Spruce Head Community Hall (built in 1923). An additional hamlet considered part of Spruce Head is found along Clark Island Road on the western shore of Wheeler Bay and lies within the township of St. George. It affords access to the Clark Island Preserve, a part of the Maine Coast Heritage Trust. Spruce Head was the boyhood home of poet and Connecticut Governor Wilbert Snow, who was born on Whitehead Island and is buried in the Ocean View Cemetery at Spruce Head. The island is home to an active lobster fishing fleet, several lobster wholesalers, and a lobster shack, which in 2017 was reviewed by Yankee Magazine as having the best lobster roll in Maine. The Spruce Head Fisherman's Co-op is the third largest fishing co-operative in Maine. In 2022 the Spruce Head fleet recorded landings valued at $18.29 million, the fourth highest in Maine for the year.

The Owls Head Light is an active aid to navigation located at the entrance of Rockland Harbor on western Penobscot Bay in the town of Owls Head, Knox County, Maine. The lighthouse is owned by the U.S. Coast Guard and licensed to the American Lighthouse Foundation. It is the centerpiece of 13-acre (5.3 ha) Owls Head State Park and was added to the National Register of Historic Places as Owls Head Light Station in 1978.

South Thomaston is a town in Knox County, Maine, United States. The population was 1,511 at the 2020 census. A fishing and resort area, the town includes the village of Spruce Head.

Whitehead Light is a lighthouse on Whitehead Island, on Muscle Ridge Channel, in the southwestern entrance to Penobscot Bay, Maine. It is in the town of St.George. Established in 1804, it is one of Maine's oldest light stations, with its present tower built in 1852 to a design attributed to Alexander Parris. It was listed on the National Register of Historic Places as Whitehead Light Station on March 14, 1988. The property is now owned by not for profit Pine Island Camp. Whitehead light station offers to the public various stays at the light station from getaway weekends to learning retreats and renting the station as a vacation home. The light itself remains an active aid to navigation, maintained by the United States Coast Guard.