Pompeys Pillar National Monument

Bureau of Land Management, Montana.



The interpretive center will remain closed until Montana Phase 3 Re-opening begins.


The Bureau of Land Management Billings Field Office is restricting access to the staircase and boardwalk that leads to the top of Pompeys Pillar. The restrictions will be in place while the BLM completes an analysis and stabilization of the pillar’s outcroppings. Visitors will be restricted from using the boardwalk until further notice. The monument and adjacent BLM lands will remain open during this time.

For more information about the area restrictions or for general information about Pompeys Pillar from May - Sept call (406) 875-2400, from Oct - Apr call (406) 896-5013

Pompeys Pillar was designated as a National Monument in January 2001.Prior to its monument status, it was a designated National Historic Landmark in 1965. It was part of the original 1803 Louisiana Purchase. Pompeys Pillar represents the legacy of the early West and its development. At the Pillar, there is evidence of Native Americans, early explorers, fur trappers, the U.S. Cavalry, railroad development and early homesteaders, many of whom left their history embedded in this sandstone pillar. Captain William Clark, his guide, Sacagawea, her 18-month old son (nicknamed "Pompey") and a crew of 11 men stopped near the 200-foot-high rock outcropping on the return leg of the Lewis and Clark Expedition. On July 25, 1806, Clark carved his signature and the date in the rock and recorded doing so in his journal. The historic signature remains today, and visitors can walk on a boardwalk to see it.


Rates & Fees

When the Monument is open (see below for season and hours), a $7 standard fee is charged for each vehicle. There is no separate fee for the interpretive center. All fees are returned to the site and used to maintain and improve the facility. All valid federal recreation passes are honored at the site.

Private Vehicle Standard Fee

Rates are based on number of passengers.

6 passengers and under--$7

7-25 passengers--$12

26+ passengers--$20

2020 Season/Hours

May 23, 2020 through October 22, 2020,

Open daily 8:00am - 4:00pm

Beginning October 23, 2020 the vehicle gates will be closed

Commercial/Group Vehicle Fees

Commercial group rates are based on vehicle capacity.

Vehicles capable of seating 6 passengers and under--$25

Vehicles capable of seating 7-25 passengers--$40

Vehicles capable of seating 26+ passengers--$100

Even when the Monument is closed, visitors may still walk into the site during daylight hours. The walk from the gates to the Pillar is about 3/4 mile. Special arrangements can be made during the off-season for school programs and other special events. Facilities available are the boardwalks, walkways, and vault toilets. All buildings will be closed.

Day Use Area

The day use area is ideal for picnicking or relaxing. It is adjacent to the Yellowstone River and shaded by large cottonwood trees.


The interpretive center, restrooms, parking lot and day use area are fully accessible.


Pets must be on a leash at all times.

Natural and Cultural Resources

Please respect our heritage and treat the Monument and its resources with respect. Do not deface any tree, shrub, rock, or ancient Indian artifact. Do not touch petroglyphs or remove any artifact. Not only is this illegal, but it erases evidence of past generations and deprives others of the knowledge about these sites.

Friends of Pompeys Pillar

The Friends of Pompeys Pillar provides substantial and much needed support for the Monument. This 200-member, nonprofit organization supplies more than 35 volunteers to assist visitors at the site and to operate the interpretive center. Profits from this enterprise assist with operation of the Monument. More than 2,500 hours of volunteer time are donated each year.

Nearby Activities


The area is easily accessible from Interstate 94, using exit 23, or from State Highway 312. The monument is 25 miles east of Billings, Montana

Additional Information