Monida Pass is a high

mountain pass A mountain pass is a navigable route through a mountain range or over a ridge. Since many of the world's mountain ranges have presented formidable barriers to travel, passes have played a key role in trade, war, and both Human migration, human a ...

in the northern

Rocky Mountains The Rocky Mountains, also known as the Rockies, are a major mountain range and the largest mountain system in North America. The Rocky Mountains stretch in straight-line distance from the northernmost part of western Canada, to New Mexico in ...

of the

western Western may refer to: Places *Western, Nebraska, a village in the US *Western, New York, a town in the US *Western Creek, Tasmania, a locality in Australia *Western Junction, Tasmania, a locality in Australia *Western world, countries that id ...

United States The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territorie ...

, at an

elevation The elevation of a geographic location is its height above or below a fixed reference point, most commonly a reference geoid, a mathematical model of the Earth's sea level as an equipotential gravitational surface (see Geodetic datum § Vert ...

of above

sea level Mean sea level (MSL, often shortened to sea level) is an average surface level of one or more among Earth's coastal bodies of water from which heights such as elevation may be measured. The global MSL is a type of vertical datuma standardised g ...

Interstate 15 Interstate 15 (I-15) is a major Interstate Highway System, Interstate Highway in the western United States, running through Southern California and the Intermountain West. I-15 begins near the Mexico–United States border, Mexican border i ...

, and on the

Union Pacific Railroad The Union Pacific Railroad , legally Union Pacific Railroad Company and often called simply Union Pacific, is a freight-hauling railroad that operates 8,300 locomotives over routes in 23 U.S. states west of Chicago and New Orleans. Union Paci ...

. On the

Continental Divide A continental divide is a drainage divide on a continent such that the drainage basin on one side of the divide feeds into one ocean or sea, and the basin on the other side either feeds into a different ocean or sea, or else is endorheic, not ...

in the

Bitterroot Range The Bitterroot Range is a mountain range and a subrange of the Rocky Mountains that runs along the border of Montana and Idaho in the northwestern United States. The range spans an area of and is named after the bitterroot (''Lewisia rediviva' ...

, it marks the transition between the

Beaverhead Mountains The Beaverhead Mountains, highest point Scott Peak, el. , are a mountain range straddling the Continental Divide in the U.S. states of Montana and Idaho. (See also the GNIS link here.) They are a sub-range of the Bitterroot Range, and divide Be ...

and the

Centennial Mountains The Centennial Mountains are the southernmost sub-range of the Bitterroot Range in the U.S. states of Idaho and Montana. The Centennial Mountains include the Western and Eastern Centennial Mountains. The range extends east from Monida Pass along ...

. Its name is derived from the states that it separates, "Mon" from

Montana Montana () is a state in the Mountain West division of the Western United States. It is bordered by Idaho to the west, North Dakota and South Dakota to the east, Wyoming to the south, and the Canadian provinces of Alberta, British Columbi ...

and "-ida" from

Idaho Idaho ( ) is a state in the Pacific Northwest region of the Western United States. To the north, it shares a small portion of the Canada–United States border with the province of British Columbia. It borders the states of Montana and Wyom ...

. The pass forms part of the border between eastern

and southwestern

, and is between the towns of Spencer in Clark County and

Lima Lima ( ; ), originally founded as Ciudad de Los Reyes (City of The Kings) is the capital and the largest city of Peru. It is located in the valleys of the Chillón River, Chillón, Rímac River, Rímac and Lurín Rivers, in the desert zone of t ...

Beaverhead County Beaverhead County is the largest county by area in the U.S. state of Montana. As of the 2020 census, the population was 9,371. Its county seat is Dillon. The county was founded in 1865. Much of the perimeter of the county is the Continental Di ...

. On the Idaho side is Beaver Creek running through Beaver Canyon, which was the route of the

Utah and Northern Railway The Utah & Northern Railway is a defunct railroad that was operated in the Utah Territory and later in the Idaho Territory and Montana Territory in the western United States during the 1870s and 1880s. It was the first railroad in Idaho and in M ...

in 1880 and is still used by Union Pacific. Union Pacific once had an icemaking plant at Humphrey, Idaho, which is now a

ghost town Ghost Town(s) or Ghosttown may refer to: * Ghost town, a town that has been abandoned Film and television * Ghost Town (1936 film), ''Ghost Town'' (1936 film), an American Western film by Harry L. Fraser * Ghost Town (1956 film), ''Ghost Town'' ...

;

Monida, Montana Monida is an unincorporated community in Beaverhead County, Montana, United States. Monida is located on Interstate 15 at the top of Monida Pass, east-southeast of Lima. The community is situated on the Continental Divide at the Idaho Ida ...

, which is near the top of the pass, is also almost a ghost town, as only seven people now live there at , below the pass Monida Stage coach garage

In the late 19th century,

stagecoach A stagecoach is a four-wheeled public transport coach used to carry paying passengers and light packages on journeys long enough to need a change of horses. It is strongly sprung and generally drawn by four horses although some versions are draw ...

es ferried tourists from the railroad at Monida Pass to

Yellowstone National Park Yellowstone National Park is an American national park located in the western United States, largely in the northwest corner of Wyoming and extending into Montana and Idaho. It was established by the 42nd U.S. Congress with the Yellowston ...

, until UP built a

branch line A branch line is a phrase used in railway terminology to denote a secondary railway line which branches off a more important through route, usually a main line. A very short branch line may be called a spur line. Industrial spur An industri ...

to the park over

Reas Pass Reas Pass, elevation , is a mountain pass on the Continental Divide in Fremont County, Idaho, about southwest of West Yellowstone, Montana. The pass lies essentially on the Idaho-Montana border, but modern maps show that the summit lies entirel ...

. Interstate 15, the "Veterans Memorial Highway," runs through the pass and north to the international boundary with

Canada Canada is a country in North America. Its ten provinces and three territories extend from the Atlantic Ocean to the Pacific Ocean and northward into the Arctic Ocean, covering over , making it the world's second-largest country by tot ...

at Sweetgrass.Montana Code Annotated 2005
-
. Retrieved 4 March 2007.

References

*
Idaho: A Climbing Guide

Retrieved 4 March 2007.
USDA Forest Service

Beaverhead-Deerlodge National Forest
- - . Retrieved 4 March 2007.
Idaho Museum of Natural History

Digital Atlas of Idaho
-

" Retrieved 4 March 2007.

External links

Montana Dept. of Transportation
- webcam - Monida Pass {{Beaverhead County, Montana Mountain passes of Idaho Mountain passes of Montana Landforms of Beaverhead County, Montana Landforms of Clark County, Idaho Rail mountain passes of the United States Great Divide of North America Borders of Idaho Borders of Montana Transportation in Beaverhead County, Montana Transportation in Clark County, Idaho