Townapedia
Bouldermontana
Bouldermontana · Finetooth, CC BY-SA 3.0
Saint Catherine Catholic Church in Boulder Montana
Saint Catherine Catholic Church in Boulder Montana · Always dreamin, CC0
Boulder Hot Springs, July 2010
Boulder Hot Springs, July 2010 · Katiemonarch, CC BY-SA 3.0
Jefferson County Courthouse (2013) - Jefferson County, Montana
Jefferson County Courthouse (2013) - Jefferson County, Montana · Robstutz, CC BY-SA 3.0
Jefferson County Courthouse, Montana 04
Jefferson County Courthouse, Montana 04 · Montanabw, CC BY-SA 3.0
Jefferson County Courthouse, Montana 01
Jefferson County Courthouse, Montana 01 · Montanabw, CC BY-SA 3.0

Boulder, Montana

Boulder is a city of 1,284 people in Jefferson County, Montana.

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Population1,284 +47.8% since 2019
Elevation4,908 ft 1,496 m
Land area1.1 sq mi
ZIP code59632
Nearest airportBert Mooney Airport (BTM) 27 mi

Why visit Boulder

Townapedia lists 6 museums and landmarks, 1 park or trail, 3 places to eat, 2 places to stay and 2 attractions in and around town.

Highlights include Boulder Hot Springs Hotel and Jefferson County Courthouse.

July is the warmest month, with average highs of 82°F; December lows average 12°F.

About Boulder

Boulder is a town in and the county seat of Jefferson County, Montana, United States. It is on the north bank of the Boulder River between Butte and Helena, slightly east of the Continental Divide, at the intersection of Interstate 15 and Montana Highway 69. The population was 1,201 at the 2020 census. It is part of the Helena Micropolitan Statistical Area, which includes all of Lewis and Clark and Jefferson counties; its population is 83,058 according to the 2020 Census.

From the Wikipedia article Boulder, Montana (this version), under CC BY-SA 4.0.

Things to do2

Capital Hill

Scenic view · 0.5 mi

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Pulpit Rock

Scenic view · 1.1 mi

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Museums and landmarks6

Boulder Hot Springs Hotel

Monument and historic site · National Register of Historic Places · 2.8 mi

Hotel in Montana, United States of America

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Jefferson County Courthouse

Monument and historic site · National Register of Historic Places

Courthouse in Montana, United States

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Montana Deaf and Dumb Asylum

Monument and historic site · National Register of Historic Places · 1.0 mi

Psychiatric hospital in Boulder, United States of America

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Montana State Training School Historic District

Monument and historic site · National Register of Historic Places · 0.6 mi

Historic district in Boulder, Montana

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The Heritage Center

Museum

210 North Main Street, Boulder

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Jefferson County Fairgrounds

Monument and historic site · 0.9 mi

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Parks, trails and playgrounds1

BLM

Hiking and trails · 1.0 mi

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Restaurants and cafes3

Dave's 32 oz Bar Grill & Bowling

Bar and pub

115 North Main Street, Boulder

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Mountain Good Restaurant

Restaurant

124 North Main Street, Boulder

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The Windsor

Bar and pub

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History

Named for the many large boulders in the vicinity, the town of Boulder Valley was established in the early 1860s as a stagecoach station on the route between Fort Benton and Virginia City. It later became a trading center for nearby agricultural areas and the Elkhorn, Comet, and Baltimore mining districts. The Great Northern Railway branch line from Helena to Butte reached Boulder in 1888. State schools for the deaf, blind, and developmentally disabled were established in the city in 1892. In 1897, the town's name was shortened to Boulder.

In the 1892 Montana capital referendum's first round, Boulder was a candidate city to become the newly-admitted Montana's capital. It faced Helena, Anaconda, Butte, Bozeman, Great Falls, and Deer Lodge. As Boulder finished last with only 295 votes, it was not in the second round in 1894, which Helena won.

From the History section of Boulder, Montana on Wikipedia, under CC BY-SA 4.0.

Where to stay2

Churches and places of worship5

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Shopping1

Gas and EV charging1

Schools, colleges and libraries5

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Map of Boulder

26 places. The map loads OpenStreetMap tiles when you open it.

Climate by month

20°40°60°80°January: 0.3 in of rainFebruary: 0.2 in of rainMarch: 0.4 in of rainApril: 0.8 in of rainMay: 1.9 in of rainJune: 2.3 in of rainJuly: 1.4 in of rainAugust: 1.1 in of rainSeptember: 1.1 in of rainOctober: 0.6 in of rainNovember: 0.5 in of rainDecember: 0.3 in of rainJanuary: 35°FFebruary: 38°FMarch: 47°FApril: 54°FMay: 64°FJune: 72°FJuly: 82°FAugust: 82°FSeptember: 72°FOctober: 57°FNovember: 42°FDecember: 34°FJanuary: 12°FFebruary: 14°FMarch: 21°FApril: 27°FMay: 35°FJune: 42°FJuly: 48°FAugust: 46°FSeptember: 38°FOctober: 28°FNovember: 19°FDecember: 12°FJFMAMJJASOND
Average high Average low Rain
Monthly table
MonthHighLowRain
Jan35°F12°F0.3 in
Feb38°F14°F0.2 in
Mar47°F21°F0.4 in
Apr54°F27°F0.8 in
May64°F35°F1.9 in
Jun72°F42°F2.3 in
Jul82°F48°F1.4 in
Aug82°F46°F1.1 in
Sep72°F38°F1.1 in
Oct57°F28°F0.6 in
Nov42°F19°F0.5 in
Dec34°F12°F0.3 in

U.S. Climate Normals 1991-2020 for Boulder (0 mi away), NOAA NCEI.

People and cost of living

$72,500median household income
$212,300median home value
$928median monthly rent
41.4median age
22.1%of adults have a bachelor's degree or higher
73.3%of homes are owner-occupied
24.9 minaverage commute
Age of residents
Under 1820%18 to 3416%35 to 6444%65 and over20%

American Community Survey 5-year estimates, 2020-2024, U.S. Census Bureau. Estimates have margins of error, larger for small towns.

Disaster history

Jefferson County has had 8 federal disaster declarations since 2000, most often for fires.

  • 2020-03-31: Covid-19 Pandemic (Biological)
  • 2020-03-13: Covid-19 (Biological)
  • 2014-04-17: Ice Jams And Flooding (Flood)
  • 2012-08-29: Nineteen Mile Fire (Fire)
  • 2011-06-17: Severe Storms And Flooding (Severe Storm)
  • 2005-09-13: Hurricane Katrina Evacuation (Hurricane)

OpenFEMA disaster declarations summaries.

Getting there and nearby towns

Bert Mooney Airport (BTM) is the nearest airport with scheduled flights listed in OpenStreetMap, 27 miles away.

  • Basin 9 mi west, about 14 min by car
  • Jefferson City 11 mi northeast, about 17 min by car
  • Clancy 16 mi north, about 25 min by car
  • Montana City 22 mi northeast, about 35 min by car
  • Unionville 22 mi north, about 35 min by car
  • South Hills 23 mi north, about 37 min by car
  • Helena 25 mi north, about 41 min by car
  • Helena West Side 25 mi north, about 40 min by car
  • Butte-Silver Bow (balance) 35 mi southwest, about 56 min by car
  • Belgrade 55 mi southeast, about 1 h 30 min by car

Drive times are estimates from straight-line distance, not routes.

Reviews, tips and questions

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Sources and licences

Photo credits

Page built October 30, 2026. Spotted a mistake? Tell us or suggest a place.