Upper Missouri River Breaks National Monument

Monument Remote national monument of badlands and river breaks

Expansive river corridor in central Montana with badlands, cliffs and prairie along the Missouri River. Visitors arrange river trips, hiking and visits to sites tied to Lewis and Clark history.

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Upper Missouri River Breaks National Monument is a federally designated landscape in north-central Montana protecting a stretch of rugged badlands and river corridor along the Missouri River. It was proclaimed a national monument in 2001 to conserve the area’s natural, cultural, and historic resources.

The monument contains extensive badlands, cliffs, and riparian habitat along the river corridor; it is used for hiking, wildlife viewing, hunting and float trips on the Missouri. The corridor preserves archaeological sites, Native American cultural sites, and places associated with 19th-century steamboat traffic and exploration.

The area was long used by Plains tribes and later by Euro-American explorers and river travelers; the Lewis and Clark expedition traversed the Missouri River through this general region in the early 19th century. The national monument designation followed centuries of use and changing federal management focused on resource protection.

The monument lies along the Missouri River in north-central Montana, occupying a remote mix of badlands, prairie, and river valley. The nearest small communities and river access points are found along the Missouri within Montana.

  • Establishment: Designated as a national monument by presidential proclamation in 2001.

How to Get to Upper Missouri River Breaks National Monument #

The monument stretches for many miles along the Missouri River in central Montana. Primary access points are along U.S. Highway 191 and by river at various boat launches; nearest towns with services include Fort Benton and Lewistown.

Tips for Visiting Upper Missouri River Breaks National Monument #

  • If planning backcountry travel or hunting, check Bureau of Land Management (BLM) notices for closures and permit requirements.
  • Bring layered clothing - temperature swings can be large between day and night.
  • Explore historical markers and river bends used by Lewis and Clark-era guides for layered historical context.

Best Time to Visit Upper Missouri River Breaks National Monument #

Visit in late spring through early fall for accessible roads and mild weather; winter conditions are severe and remote.

Late spring to early fall
May-September · 45-85°F (7-29°C)
Best weather for hiking, horseback riding, and viewing river wildlife.
Winter
December-February · -10-25°F (-23--4°C)
Remote and harsh; travel can be challenging but the landscape is stark and empty.

Weather & Climate near Upper Missouri River Breaks National Monument #

Climate

Upper Missouri River Breaks National Monument's climate is classified as Cold Semi-Arid - Cold Semi-Arid climate with warm summers (peaking in July) and freezing winters (coldest in January). Temperatures range from -14°C to 29°C. Semi-arid with limited rainfall.

Temperature & Rainfall
Temperature Range
29°
Warmest Month
-14°
Coldest Month
Monthly Conditions

January

January is the coldest month with highs of -1°C and lows of -14°C. Light rainfall.

Comfort

-8°
Feels Like Freezing
-8°C
Temperature
-14° -1°

Weather

16 mm
Rainfall
4.4 m/s
Wind
Light Breeze

February

February is freezing with highs of 3°C and lows of -10°C. The driest month with just 10 mm.

Comfort

-3°
Feels Like Freezing
-3°C
Temperature
-10°

Weather

10 mm
Rainfall
4.3 m/s
Wind
Light Breeze

March

March is cold with highs of 8°C and lows of -6°C. Light rainfall.

Comfort

Feels Like Cold
C
Temperature
-6°

Weather

16 mm
Rainfall
4.4 m/s
Wind
Light Breeze

April

April is cold with highs of 14°C and lows of -1°C. Light rainfall.

Comfort

Feels Like Cold
C
Temperature
-1° 14°

Weather

28 mm
Rainfall
4.7 m/s
Wind
Light Breeze

May

May is cool with highs of 20°C and lows of 5°C. The wettest month with 68 mm of rain.

Comfort

12°
Feels Like Cool
12°C
Temperature
20°

Weather

68 mm
Rainfall
4.5 m/s
Wind
Light Breeze

June

June is cool with highs of 25°C and lows of 10°C. Moderate rainfall (61 mm).

Comfort

18°
Feels Like Cool
18°C
Temperature
10° 25°

Weather

61 mm
Rainfall
4.2 m/s
Wind
Light Breeze

July

July is the warmest month with highs of 29°C and lows of 12°C. Moderate rainfall (39 mm).

Comfort

21°
Feels Like Mild
21°C
Temperature
12° 29°

Weather

39 mm
Rainfall
3.8 m/s
Wind
Light Breeze

August

August is mild with highs of 29°C and lows of 11°C. Moderate rainfall (39 mm).

Comfort

20°
Feels Like Mild
20°C
Temperature
11° 29°

Weather

39 mm
Rainfall
3.8 m/s
Wind
Light Breeze

September

September is cool with highs of 22°C and lows of 6°C. Moderate rainfall (35 mm).

Comfort

14°
Feels Like Cool
14°C
Temperature
23°

Weather

35 mm
Rainfall
4.0 m/s
Wind
Light Breeze

October

October is cold with highs of 16°C and lows of 0°C. Light rainfall.

Comfort

Feels Like Cold
C
Temperature
16°

Weather

18 mm
Rainfall
4.3 m/s
Wind
Light Breeze

November

November is freezing with highs of 6°C and lows of -7°C. Light rainfall.

Comfort

Feels Like Freezing
C
Temperature
-7°

Weather

12 mm
Rainfall
4.4 m/s
Wind
Light Breeze

December

December is freezing with highs of 1°C and lows of -12°C. Light rainfall.

Comfort

-6°
Feels Like Freezing
-6°C
Temperature
-12°

Weather

15 mm
Rainfall
4.5 m/s
Wind
Light Breeze

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