Pompeys Pillar National Monument and Visitor Center
Pompeys Pillar National Monument is a remarkable testament to human history, showcasing hundreds of markings, petroglyphs, and inscriptions that create a living journal of the American West. For over 11,000 years, many peoples celebrated this sandstone outcrop as a landmark and outstanding observation point, with explorer William Clark of the Lewis and Clark Expedition leaving his mark alongside countless others.
Visit the Monument and climb the boardwalk to the top of the pillar, learn about the Lewis and Clark expedition and more at the Visitor Center, and enjoy the picturesque riverside grounds and trails.
Hours and Seasons
The monument is open May through September, with exact operating dates varying annually.
For summer 2025, the Monument gates are open from 9 a.m. to 4 p.m. every day except Wednesdays. The Visitor Center is open Thursdays through Saturdays from 9 a.m. to 4 p.m. When the Monument gate is closed, visitors may still walk the ¾ miles to the site during daylight hours.
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Activities
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Geographic Coordinates
Directions
The Monument is 25 miles east of Billings, Montana. It can be easily accessed from exit 23 of Interstate 94, or from State Highway 312.
Fees
America the Beautiful Passes are accepted and allow free day use at Pompeys Pillar National Monument and Visitor Center. Pompeys Pillar also has a Monument-specific annual pass option. Otherwise, the following day-use fees apply:
Standard Vehicles
- 1 – 6 passengers: $7
- 7 – 25 passengers: $12
- 26+ passengers: $20
Commercial / Group Vehicles
- 1 – 6 passengers: $25
- 7 – 25 passengers: $40
- 26+ passengers: $100
All fees are used by the local BLM recreation program to maintain and improve the facilities.
Payment can be made by credit card at the entrance booth during business hours, or by cash or check at the entrance booth outside of business hours. Passes can also be purchased online through Recreation.gov or the Recreation.gov mobile app for the same price, plus a small transaction fee.