The Boulder Mountains is a

mountain range A mountain range or hill range is a series of mountains or hills arranged in a line and connected by high ground. A mountain system or mountain belt is a group of mountain ranges with similarity in form, structure, and alignment that have arise ...

running north–south west of Boulder between Helena and

Butte __NOTOC__ In geomorphology, a butte () is an isolated hill with steep, often vertical sides and a small, relatively flat top; buttes are smaller landforms than mesas, plateaus, and tablelands. The word ''butte'' comes from a French word me ...

in the U.S. state of

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 Columb ...

. Parts of the range are in four different counties:

Deer Lodge Deer Lodge is a city in and the county seat of Powell County, Montana, United States. The population was 2,938 at the 2020 census. Description The city is perhaps best known as the home of the Montana State Prison, a major local employer. ...

Jefferson Jefferson may refer to: Names * Jefferson (surname) * Jefferson (given name) People * Thomas Jefferson (1743–1826), third president of the United States * Jefferson (footballer, born 1970), full name Jefferson Tomaz de Souza, Brazilian foo ...

, Lewis and Clark, and Silver Bow. Haystack Mountain, which reaches , is the tallest peak in the range. The three other highest peaks are Jack Mountain at , Bull Mountain at , and Thunderbolt Mountain at . All four peaks are in Jefferson County.

References

{{Montana Mountain ranges of Montana Landforms of Deer Lodge County, Montana

See also

References