The visitor center at Pompeys Pillar National Monument is open from May 1st to September 30th, daily from 9 AM to 4 PM. During the off-season, the monument is closed, but visitors can still walk in during daylight hours.
The entrance fee at Pompeys Pillar National Monument is $7 per vehicle for 1-6 passengers, $13 for 7-25 passengers, and $22 for 26 or more passengers. The main gate is open from May 1 to September 30. Walk-in access is free year-round during daylight hours.
From Billings, take Interstate 94 east to exit 23, then follow signs 0.5 miles to this historic Yellowstone River landmark, where Lewis and Clark’s legacy comes alive.
Pompeys Pillar has ample parking, including RV spots and accessible spaces near the interpretive center. Parking fees are $7 per vehicle; no overnight parking. RVs and motorcycles welcome.
Accessibility & permits
Emergency
- Cell service availability:Partial
Pompeys Pillar National Monument, situated 25 miles northeast of Billings, Montana, stands as a testament to the region’s rich historical and natural beauty. This 51-acre site, managed by the Bureau of Land Management, features a majestic sandstone outcrop that rises 150 feet above the Yellowstone River. The pillar, part of the late Cretaceous Hell Creek Formation, is adorned with an array of Native American petroglyphs and the iconic signature of Captain William Clark, dated July 25, 1806, the only remaining physical evidence of the Lewis and Clark Expedition’s route.
The landscape is a tapestry of rolling hills and vast river valleys, with the Yellowstone River flowing gently beneath the pillar. The area is home to a diverse array of flora and fauna, including robust birdlife that attracts enthusiasts from across the country. The Pompeys Pillar Interpretive Center, opened in 2006, offers a 5,700-square foot space filled with exhibits detailing Clark’s journey, native cultures, and the local ecosystem.
Visitors can stroll along the Riverwalk, take in the panoramic views from the viewing areas north of the pillar, and explore the surrounding terrain. The monument sees 50,000 visitors annually, drawn by its unique blend of history and natural splendor. For those seeking a deeper immersion, local outfitters provide opportunities for canoe tours and bird-watching excursions. The nearby town of Billings offers a range of amenities, including artisan shops and restaurants, making Pompeys Pillar National Monument a compelling destination for those seeking a blend of history, nature, and cultural richness.
- Area (mi²)
- 1
- Annual visitors
- 29 000
- Established year
- 2001
Top 3 Facts about Pompeys Pillar National Monument
The monument features a massive sandstone outcrop covering about 2 acres at its base, standing along the banks of the Yellowstone River.
In this pristine landscape, mule and whitetail deer roam alongside fox, coyotes, and raccoons, while occasional sightings of mountain lions and black bears add an air of wildness. The Yellowstone River supports a diverse array of neo-tropical migratory birds, including warblers, vireos, and tanagers, with Great Horned owls, Bald Eagles, and Osprey nesting in the vicinity. The mixed grass prairie and sandstone cliffs provide habitats for yellow-bellied marmots and numerous small mammals, amphibians, and reptiles, making this a rich tapestry of wildlife and natural beauty.
Along the banks of the Yellowstone River, a 200-foot-high sandstone outcrop stands as a testament to geological history. The river’s clear waters flow gently past this monumental formation, created from sand and silt deposited over 65 million years ago. The surrounding landscape is marked by the rising Rocky Mountains, adding a dramatic backdrop to this natural wonder. The outcrop’s light-colored, gritty rock face is a striking feature, making it a landmark for centuries. The area’s unique rock formations and historic significance make it an compelling destination for those seeking an immersive natural experience.
Family programs
- Junior Ranger
- Self-guided Tours
- Workshops & Hands-on Activities
- Living History & Cultural Demos
- Scavenger Hunts
- Arts & Crafts
Travel Tips
Plan Ahead
Visit in summer for optimal weather. Allow a half-day to explore the monument. Park near the interpretive center, then follow the 1,000-foot boardwalk and 200 steps to the top. Bring a picnic and rest under cottonwood trees. Limited dining options nearby.
Pack Appropriately
Pack layers for variable weather, sturdy hiking boots, and a waterproof jacket. Bring a daypack with snacks, water, and a first-aid kit. For camping, include a tent, sleeping bag, and multi-tool. Check the season for specific gear needs.
Respect Wildlife
Maintain a safe distance from wildlife, at least 25 yards, to avoid disrupting their natural behavior. Obey speed limits and watch for animals crossing roads, especially during peak migration seasons. Leave no trace and dispose of waste properly to preserve the natural habitat. Respect local flora and fauna by staying on designated trails and avoiding invasive activities.
Stay Informed
Stay on marked trails, avoid ledges and water edges, and check weather and fire restrictions. Carry a map, stay hydrated, and know the emergency number: 911. Be aware of seasonal temperature changes and respect park rules.
Seasons
Visit in spring as temperatures rise to the 60s and 70s, with mild weather perfect for hiking. The Interpretive Center opens May 1st, coinciding with the start of warmer days, offering a chance to explore historic trails and Clark’s signature amidst blooming flora.
Visit in summer for warm days (70s-90s°F) and clear skies. Attend the Public Star Party on the 2nd Saturday of each month, or Clark Days in July or August, to immerse in history and stargaze under vast skies. Ideal for outdoor enthusiasts.
Visit in fall, from October to April, for crisp temperatures (40s-50s°F) and fewer crowds. Though visitor services are closed, the site remains accessible. Enjoy the serene Yellowstone River backdrop and historic petroglyphs under autumn skies. Special arrangements can be made for school programs and events during this season.
From October to April, experience the serene winter landscape with temperatures often below 32°F. Though the main gate is closed, visitors can walk in during daylight hours, enjoying the tranquility and historical significance amidst the snow-covered scenery.Ideal for those seeking a peaceful, off-season adventure.
Frequently Asked Questions
Ready to dive into what Pompeys Pillar National Monument has to offer? Let’s tackle some of the burning questions you might have as you plan your visit!
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The closest city to Pompeys Pillar National Monument is Billings, Montana, which is about 25 miles to the west. The monument is accessible via Interstate 94, using exit 23.
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Dogs must be on a leash no longer than 6 feet at all times. They must also wear a collar with current tags and owners must pick up after them. Leashes are required in all areas of the monument.
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Yes, there are parking fees. It costs $7 per vehicle per day, with no additional fees for different types of vehicles like campers, motorhomes, or trailers. Fees are waived for Golden Age, Golden Access, and Golden Eagle Passport holders.
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The top attraction is the massive 120-foot-high sandstone outcrop, marked by William Clark’s engraving from the Lewis and Clark Expedition in 1806, as well as over 5,000 other etchings, petroglyphs, and pictographs. This site has historical significance as a campsite for Native peoples and later for fur trappers, military expeditions, and settlers. The Interpretive Center also highlights the journey of Captain William Clark and the cultural importance of the area.