State Route 102 is a north-south state highway

State highway

State highway, state road or state route can refer to one of three related concepts, two of them related to a state or provincial government in a country that is divided into states or provinces :#A...

 located on Mount Desert Island

Mount Desert Island

Mount Desert Island , in Hancock County, Maine, is the largest island off the coast of Maine. With an area of it is the 6th largest island in the contiguous United States. Though it is often claimed to be the third largest island on the eastern seaboard of the United States, it is actually second...

 in eastern Maine

Maine

Maine is a state in the New England region of the northeastern United States, bordered by the Atlantic Ocean to the east and south, New Hampshire to the west, and the Canadian provinces of Quebec to the northwest and New Brunswick to the northeast. Maine is both the northernmost and easternmost...

. As of 2007, its southern terminus is located at an intersection with State Route 102A in Tremont

Tremont, Maine

Tremont is a town in Hancock County, Maine, United States. It is located on the southwestern side of Mount Desert Island, known to locals as "the quietside."...

 on the southern part of the island. Its northern terminus is at intersection with State Route 3

Maine State Route 3

State Route 3 is part of Maine's system of numbered state highways, running from Interstate 95 exit 113 in Augusta to an intersection with Route 102 in the village of Somesville in the town of Mount Desert, on Mount Desert Island...

 in Bar Harbor

Bar Harbor, Maine

Bar Harbor is a town on Mount Desert Island in Hancock County, Maine, United States. As of the 2010 census, its population is 5,235. Bar Harbor is a famous summer colony in the Down East region of Maine. It is home to the College of the Atlantic, Jackson Laboratory and Mount Desert Island...

, along with the northern terminus of State Route 198.

Junction list

County	Location	Mile	Roads intersected	Notes
Hancock Hancock County, Maine Hancock County is a county located in the U.S. state of Maine. As of 2010, the population was 54,418. Its county seat is Ellsworth. It was incorporated on June 25, 1789...	Tremont Tremont, Maine Tremont is a town in Hancock County, Maine, United States. It is located on the southwestern side of Mount Desert Island, known to locals as "the quietside."...	0.00	Route 102A	Southern terminus of Route 102. Southern terminus of Route 102A.
	Southwest Harbor Southwest Harbor, Maine Southwest Harbor is a town in Hancock County, Maine, United States. Located on Mount Desert Island, the population was 1,966 at the 2000 census.-Geography:...	1.7	Route 102A	Northern terminus of Route 102A.
	Mount Desert Mount Desert, Maine Mount Desert is a town on Mount Desert Island in Hancock County, Maine, United States. The population was 2,109 at the 2000 census. Incorporated in 1789, the town currently encompasses the villages of Otter Creek, Seal Harbor, Northeast Harbor, Somesville, Hall Quarry, and Pretty...	8.7	Route 3 Maine State Route 3 State Route 3 is part of Maine's system of numbered state highways, running from Interstate 95 exit 113 in Augusta to an intersection with Route 102 in the village of Somesville in the town of Mount Desert, on Mount Desert Island... Route 198 South	Eastern terminus of Route 3. Southern terminus of Route 102/198 concurrency.
	Bar Harbor Bar Harbor, Maine Bar Harbor is a town on Mount Desert Island in Hancock County, Maine, United States. As of the 2010 census, its population is 5,235. Bar Harbor is a famous summer colony in the Down East region of Maine. It is home to the College of the Atlantic, Jackson Laboratory and Mount Desert Island...	12.99	Route 3 Route 198	Northern terminus of Routes 102/198. Northern terminus of Route 102/198 concurrency.

History

Route 102 was originally designated in 1925 and ran between Augusta and Belfast. The more modern routing was established in 1946, when it was truncated to run between Seal Cove and its current northern terminus at Route 3 in Bar Harbor. In 1951, the southern portion of the route was extended, causing Route 102 to loop around the island clockwise and terminate at itself near Somes Pond, creating a lasso-shaped route in which one could be traveling due north on a road signed "south".

The western half of the loop was removed in 2007, truncating Route 102 to the western terminus of Route 102A in Tremont, leaving the rest of the loop unnumbered.

State Route 102A

State Route 102A is a 6.8-mile loop of Route 102 on the southeastern tip of Mount Desert Island

Mount Desert Island

Mount Desert Island , in Hancock County, Maine, is the largest island off the coast of Maine. With an area of it is the 6th largest island in the contiguous United States. Though it is often claimed to be the third largest island on the eastern seaboard of the United States, it is actually second...

. It is signed as a north-south route, but follows a more east-west orientation. It begins at Route 102 in Tremont

Tremont, Maine

Tremont is a town in Hancock County, Maine, United States. It is located on the southwestern side of Mount Desert Island, known to locals as "the quietside."...

 and runs east to Route 102 in Southwest Harbor

Southwest Harbor, Maine

Southwest Harbor is a town in Hancock County, Maine, United States. Located on Mount Desert Island, the population was 1,966 at the 2000 census.-Geography:...

, passing through the Manset and Seawall areas along the way.

Junction list

County	Location	Mile	Roads intersected	Notes
Hancock Hancock County, Maine Hancock County is a county located in the U.S. state of Maine. As of 2010, the population was 54,418. Its county seat is Ellsworth. It was incorporated on June 25, 1789...	Tremont Tremont, Maine Tremont is a town in Hancock County, Maine, United States. It is located on the southwestern side of Mount Desert Island, known to locals as "the quietside."...	0.00	Route 102	Southern terminus of Route 102. Southern terminus of Route 102A.
	Southwest Harbor Southwest Harbor, Maine Southwest Harbor is a town in Hancock County, Maine, United States. Located on Mount Desert Island, the population was 1,966 at the 2000 census.-Geography:...	6.84	Route 102	Northern terminus of Route 102A.