Pompeys Pillar National Monument
Pompeys Pillar National Monument preserves the only remaining physical evidence of the Lewis and Clark expedition's journey across the American West—Captain William Clark's signature carved into the 200-foot sandstone pillar on July 25, 1806. Families can climb the 120-step boardwalk to the top of the pillar, where they'll discover interpretive displays about the expedition and panoramic views of the Yellowstone River valley. The site's compact nature makes it perfect for younger explorers, with the main trail being fully accessible and taking just 20-30 minutes to complete. What sets this monument apart from other Lewis and Clark sites is the authentic signature itself—protected behind glass but clearly visible—making history tangible in a way few places can match.
Junior Ranger Program at Pompeys Pillar National Monument
The Junior Ranger program at Pompeys Pillar focuses on Lewis and Clark expedition history and Native American heritage through hands-on activities and exploration. Kids complete age-appropriate booklets while discovering the famous Clark signature, learning about Sacagawea's contributions, and understanding how this landmark guided travelers for centuries.
- See Captain William Clark's actual carved signature from 1806
- Easy boardwalk trail perfect for all ages and abilities
- Interactive exhibits about Lewis & Clark expedition and Native American history
Program Details
Best Ages for Pompeys Pillar National Monument
Age ranges are suggested groupings — check at the visitor center for the official Junior Ranger booklet breakdown.
Ages 4–7
Young kids absolutely love the boardwalk climb to the top of the pillar, which feels like a real adventure without being too strenuous. The Junior Ranger activities typically focus on simple observation and drawing exercises that help them connect with the Lewis and Clark story. The compact site means little legs won't get tired, and the visitor center offers engaging exhibits at kid-friendly heights.
Ages 8–12
This age group truly connects with the historical significance of seeing Clark's actual signature and understanding the expedition's challenges. Junior Ranger activities typically include more detailed questions about Native American culture and the expedition's journey down the Yellowstone River. Kids this age love comparing modern travel to what the Corps of Discovery experienced over 200 years ago.
Ages 13+
Teens and adults appreciate the site's role in westward expansion and its significance to multiple Native American tribes who used this landmark for centuries before Lewis and Clark arrived. The Junior Ranger program typically includes more complex activities about cultural perspectives and historical interpretation. Many families find this age group becomes fascinated with the preservation challenges of protecting Clark's signature from weather and vandalism.
Planning Your Visit
Getting There
The monument is located 28 miles east of Billings along Interstate 94, with clear highway signs directing you to the site. Parking is first-come, first-served in a small lot that can accommodate most RVs, though spaces fill quickly during summer months. No reservations are needed for general admission, but large groups should call ahead.
Van & RV Notes
The parking area accommodates RVs up to 40 feet, making it suitable for most Sprinter vans and larger motorhomes. There's no overnight camping at the monument itself, but Pompeys Pillar RV Park is located adjacent to the monument with full hookups. The boardwalk and trails are accessible, though the 120 steps to the top of the pillar require moderate mobility.
Best Time to Visit
Late May through September offers the best weather and full facility access, with July and August bringing the most consistent Junior Ranger programming. Spring visits in April and May can be excellent for avoiding crowds, though weather can be unpredictable. Winter visits are possible but facilities may be limited and the boardwalk could be icy.
How Long to Spend
Plan a half-day visit to fully explore the site, complete Junior Ranger activities, and enjoy the interpretive programs. The compact nature means you can see everything in 2-3 hours, but many families extend their visit by picnicking along the Yellowstone River.
Don't Miss
The climb to the top of the pillar where you can see Clark's signature behind protective glass is absolutely essential—it's the whole reason this place exists and kids love the boardwalk adventure. We also truly love the riverside picnic area where families can imagine the Corps of Discovery camping along these same banks over two centuries ago.
Fun Facts for Kids
Captain Clark's signature is the only remaining physical evidence you can see from the entire Lewis and Clark expedition across the American West
Native American tribes called this landmark 'the place where mountain lion urinated' due to yellow stains on the rock face
The sandstone pillar stands 200 feet tall and has served as a landmark for travelers for thousands of years
Over 5,000 people have carved their names into the rock since Clark, though it's now illegal and the historical graffiti is being preserved
Plan Your Stay
Save on park entry with the America the Beautiful Pass — $80 for unlimited access to all 400+ National Park sites for a full year.
Where to Stay
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Nearby Parks to Earn More Badges
Bighorn Canyon National Recreation Area
Bighorn Canyon National Recreation Area offers stunning canyon views and water recreation just 40 miles south, perfect for families wanting to extend their Montana adventure
Little Bighorn Battlefield National Monument
Little Bighorn Battlefield National Monument provides powerful insights into one of the most famous battles in American history, located about 60 miles southeast
Yellowstone National Park
Yellowstone National Park's northeast entrance is roughly 100 miles southwest, making Pompeys Pillar an excellent historical stop en route to America's first national park
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