Thing to Do

Explore the Cannonball Concretions

Several large round rocks eroded out of the side of a butte. The sky above the butte is cloudy blue.
Cannonball Concretions

NPS Photo/J. Zylland

Driving the North Unit Scenic Drive, the cannonball concretions can be an arresting sight. These large, round rocks don't seem to fit with the rest of the landscape. Stop at this pullout and explore their mysteries!

Hikers can also access the 11.4 mile Buckhorn trail at this pullout. Proper hiking gear, water, and sun protection are recommended. 

It is illegal to remove any resource from a national park. Leave any flower, stone, or other object where you find it so that other visitors can enjoy it as well. 

It is illegal to carve, paint, or otherwise alter anything in a national park. 
The cannonball concretions are contained to a relatively small area, though there is access to the Buckhorn trail at this pullout. 
The area around the cannonball concretions is unpaved and may have loose stone, uneven footing, or slip hazards. Proper footwear is recommended. Ticks, flies, and other biting insects may be present in the summer. 
Entrance fees may apply, see Fees & Passes information.
The Cannonball Concretion Pullout is located approximately 5 miles into the North Unit of Theodore Roosevelt National Park, located on the north side of the road across from the entrance to Juniper Campground. The parking area has spaces for cars and RVs, including accessible spaces.
Weather conditions may cause unstable or slippery conditions. Check with a ranger for current conditions.
Accessibility Information
A sidewalk provides accessible viewing of the cannonball concretions and of an interpretive exhibit.

The cannonball concretions are located in an unpaved area which may include uneven ground and potential slip hazards. Proper footwear is recommended. Service animals are allowed, but must be on a leash no longer than 6 feet.

Theodore Roosevelt National Park

Last updated: February 8, 2021