Altamont is an unincorporated community

Unincorporated area

In law, an unincorporated area is a region of land that is not a part of any municipality.To "incorporate" in this context means to form a municipal corporation, a city, town, or village with its own government. An unincorporated community is usually not subject to or taxed by a municipal government...

 in Garrett County

Garrett County, Maryland

Garrett County is the westernmost county of the U.S. state of Maryland. Created from Allegany County, Maryland in 1872 it was the last Maryland county to be formed. It was named for John Work Garrett , railroad executive, industrialist, and financier. Garrett served as president of the Baltimore...

, Maryland

Maryland

Maryland is a U.S. state located in the Mid Atlantic region of the United States, bordering Virginia, West Virginia, and the District of Columbia to its south and west; Pennsylvania to its north; and Delaware to its east...

, United States

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

. Altamont sits on the Eastern Continental Divide

Eastern Continental Divide

The Eastern Continental Divide, in conjunction with other continental divides of North America, demarcates two watersheds of the Atlantic Ocean: the Gulf of Mexico watershed and the Atlantic Seaboard watershed. Prior to 1760, the divide represented the boundary between British and French colonial...

 between the watershed of Crabtree Creek, which flows into the Savage River

Savage River (Maryland)

The Savage River is a river in Garrett County, Maryland, and is the first major tributary of the North Branch Potomac River from its source. The river was named for 18th century surveyor John Savage....

 and eventually into the Atlantic Ocean

Atlantic Ocean

The Atlantic Ocean is the second-largest of the world's oceanic divisions. With a total area of about , it covers approximately 20% of the Earth's surface and about 26% of its water surface area...

, and the watershed of the Little Youghiogheny River, which flows into the Youghiogheny River

Youghiogheny River

The Youghiogheny River , or the Yough for short, is a tributary of the Monongahela River in the U.S. states of West Virginia, Maryland, and Pennsylvania...

 and eventually into the Gulf of Mexico

Gulf of Mexico

The Gulf of Mexico is a partially landlocked ocean basin largely surrounded by the North American continent and the island of Cuba. It is bounded on the northeast, north and northwest by the Gulf Coast of the United States, on the southwest and south by Mexico, and on the southeast by Cuba. In...

. Altamont is notable as the spot at which the B&O Railroad crossed the divide. Today, that same spot is crossed by CSX

CSX Transportation

CSX Transportation operates a Class I railroad in the United States known as the CSX Railroad. It is the main subsidiary of the CSX Corporation. The company is headquartered in Jacksonville, Florida, and owns approximately 21,000 route miles...

's Mountain Subdivision

Mountain Subdivision

The Mountain Subdivision is a railroad line owned and operated by CSX Transportation in the U.S. states of Maryland and West Virginia. The line runs from Cumberland, Maryland west to Grafton, West Virginia along the original Baltimore and Ohio Rail Road main line...

. Altamont also features the intersection of Maryland Route 135

Maryland Route 135

Maryland Route 135 is a state highway in the U.S. state of Maryland. Known for most of its length as Maryland Highway, the state highway runs from U.S. Route 219 in Oakland in Garrett County east to US 220 in McCoole in Allegany County...

 (MD 135) and MD 495

Maryland Route 495

Maryland Route 495 is a state highway in the U.S. state of Maryland. Known for most of its length as Bittinger Road, the state highway runs from MD 135 in Altamont north to U.S. Route 40 Alternate in Grantsville. MD 495 passes through rural areas of central Garrett County, connecting Bittinger...

.