1523 14th St. West, Ste. 2
Billings, MT 59102

Mailing Address:
P.O. Box 23535
Billings, MT 59104

Welcome to Friends of Pompeys Pillar

Opening day for the 2018 Season: April 28th

We invite you to take a journey through our website to explore and learn more about the history of Pompeys Pillar National Monument.

We are a 501(c)(3) non-profit established in 1989 to support Pompeys Pillar National Monument, which contains the last physical evidence of the Lewis and Clark Expedition of 1803-1806. Our mission is to preserve and protect the monument by educating visitors through interpretation, special projects, and support the Bureau of Land Management (BLM) in its management of the site. The efforts of the Friends group was a driving force to get the site into the public lands domain, which resulted in the purchase of the historical land from the Foote family by the BLM in 1991. By working cooperatively with the BLM in the planning and administration of the site, the Friends group successfully accomplishes this mission.

We look forward to your visit!

Events – 2018

April 4th – Volunteer Cleanup Day 10am – 2pm
April 28th – Opening Day for the 2018 Season
July 25th – Clark’s Day Event
Sept 29th – First Annual Fall Festival 8am – 4pm
Visit our Facebook page on more details about events.


 Walk-ins after hours are always welcome. Approximately a one mile walk from gate to Pillar.

May – September
   Front Gates: 8:00am – 5:30pm
   Interpretive Center: 9:00am – 6:00pm
   Gift Store: 9:00am – 5:30pm

October (Weather Dependent)
    Front Gates: 8:00am – 4:00pm
    Interpretive Center: 9:00am – 4:00pm
    Outbound Gate: Closes at 4:30pm

RV parking spots are available.


3039 Highway 312 Pompeys Pillar, MT
46° N -108° W
(406) 875-2400

The Pillar overlooks the Yellowstone River about 25 miles east of Billings, Montana. The area is easily accessible from I-94, using exit 23.



Only during operational months and hours.

$25 Commercial 1-6 people
$40 Commercial Van 7-24 people
$100 Commercial Bus 25+ people
$20 Pompeys Pillar Membership Pass


Pompeys Pillar National Monument accepts and sells the following Interagency passes:
    Senior (Golden Age)
    Volunteer (not available for sale on site)