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.
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.
Weather & Climate near Upper Missouri River Breaks National Monument #
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.
January
January is the coldest month with highs of -1°C and lows of -14°C. Light rainfall.
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February
February is freezing with highs of 3°C and lows of -10°C. The driest month with just 10 mm.
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March
March is cold with highs of 8°C and lows of -6°C. Light rainfall.
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April
April is cold with highs of 14°C and lows of -1°C. Light rainfall.
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May
May is cool with highs of 20°C and lows of 5°C. The wettest month with 68 mm of rain.
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June
June is cool with highs of 25°C and lows of 10°C. Moderate rainfall (61 mm).
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July
July is the warmest month with highs of 29°C and lows of 12°C. Moderate rainfall (39 mm).
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August
August is mild with highs of 29°C and lows of 11°C. Moderate rainfall (39 mm).
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September
September is cool with highs of 22°C and lows of 6°C. Moderate rainfall (35 mm).
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October
October is cold with highs of 16°C and lows of 0°C. Light rainfall.
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November
November is freezing with highs of 6°C and lows of -7°C. Light rainfall.
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December
December is freezing with highs of 1°C and lows of -12°C. Light rainfall.