Pompeys Pillar National Monument
Pompeys Pillar, Yellowstone County, Montana. National monument.
Details
- Where
- 3039 US Highway 312, Pompeys Pillar, MT. Directions
- When
- Monument gates 8:00 am - 4:00 pm daily, except Tuesdays when the Monument is closed for maintenance; vehicle entrance gate closes at 3:30 pm; vehicle exit gate and Interpretive Center close at 4:00pm.
- Season
- 2026 season: open 01 May 2026, last day of operation 30 September 2026, close 01 October 2026.
- Getting there
- 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
- Standard vehicles: $7 (1-6 passengers), $12 (7-25 passengers), $20 (26+ passengers); commercial/group vehicles: $25 (1-6 passengers), $40 (7-25 passengers), $100 (26+ passengers).
- Access
- Open during daylight hours only; when the vehicle gates are closed, including on Tuesdays, visitors may park outside the gates and walk-in during daylight hours.
- Phone
- 406-896-5013
- Website
- blm.gov
- Managed by
- Billings Field Office.
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.