Citadel Rock

Fort Benton, Montana

Citadel Rock: Citadel Rock
Citadel Rock: lightening
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Mailing Address:

PO Box 1389, Fort Benton, MT 59442

Contact Info

406-622-4000

877-256-3252

About Citadel Rock

Citadel Rock is a shonkinite intrusion in north central Montana along the Missouri River. This landmark is accessible by boat only. About one mile downstream from the landmark is the Hole-in-the-Wall boat-camp. The BLM maintains this campground which includes vaulted toilets, three-sided log shelters and fire rings. The camps namesake, a geographic sandstone formation, is aptly named Hole-in-the-Wall.

These are fine-grained igneous rocks, dominated by dark-colored minerals, occur as dikes, sills and stocks injected into fractures in the Cretaceous age sandstones and shales. They range in age from Tertiary to late Cretaceous. They are more resistant to weathering than the enclosing sedimentary rocks, causing them to form promontory features in the surrounding terrain.

Citadel Rock Activities

History

Citadel Rock Amenities

Citadel Rock Reservations

About Citadel Rock

Citadel Rock is a shonkinite intrusion in north central Montana along the Missouri River. This landmark is accessible by boat only. About one mile downstream from the landmark is the Hole-in-the-Wall boat-camp. The BLM maintains this campground which includes vaulted toilets, three-sided log shelters and fire rings. The camps namesake, a geographic sandstone formation, is aptly named Hole-in-the-Wall.

These are fine-grained igneous rocks, dominated by dark-colored minerals, occur as dikes, sills and stocks injected into fractures in the Cretaceous age sandstones and shales. They range in age from Tertiary to late Cretaceous. They are more resistant to weathering than the enclosing sedimentary rocks, causing them to form promontory features in the surrounding terrain.

Citadel Rock Activities

History

Citadel Rock Amenities

Citadel Rock Reservations

About Fort Benton, Montana

Elevation: 2,698

Population: 1,413

County: Chouteau

Tucked away in a valley on the Missouri River and surrounded by high bluffs, Fort Benton has served as the perfect gateway to Montana adventure for nearly two hundred years. Fur traders established a fort at the site a generation before the Montana gold rushes of the 1860s making Fort Benton the... ...

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