State Route 89 is part of 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...

's system of numbered state highways. It runs 10.89 miles (17.5 km) from an intersection with State Route 161

Maine State Route 161

State Route 161 is part of Maine's system of numbered state highways. It runs from Fort Fairfield to Allagash. It begins at an intersection with U.S. 1A in Fort Fairfield, and deadends at the St. John River west of Allagash.....

 in Caribou

Caribou, Maine

Caribou is the second largest city in Aroostook County, Maine, United States. Its population was 8,189 at the 2010 census.-History:Between 1838 and 1839, the undeclared Aroostook War flared between the United States and Canada, and the Battle of Caribou occurred in December 1838...

 to an intersection with U.S. 1A in Limestone

Limestone, Maine

Limestone is a town in Aroostook County, Maine, United States. The population was 2,314 at the 2010 census. The town is best known for being the home of the Loring Commerce Center...

. The route is also known as Access Highway (in Caribou) and Foster Avenue (in Limestone).

The road was designated as a service route for the now defunct Loring Air Force Base

Loring Air Force Base

Loring Air Force Base is a former United States Air Force base that was under the operational control of the Strategic Air Command for most of its existence. In 1992, it was transferred to the newly-established Air Combat Command, and it was finally closed as an active Air Force installation in...

.