Get Your FREE Ultimate Weekend Packing Cheat Sheet!

Popeys Pillar National Monument
Picture of Anna Marie

Anna Marie

Pompeys Pillar National Monument in Montana is where you'll find the only remaining physical evidence along the trail blazed by the Lewis and Clark Expedition in the early 19th century.
A woman sipping coffee outside
Hi, I’m Anna Marie. I’m a wife, mother, Irish dancer, and pug mom living in North Carolina. I also love to travel. Come along for the ride! If you see something you like, don’t be afraid to say, ‘Pull over and let me out.’

If you’ve already read this article and are ready to plan your trip, click on this image.
#everytripmatters

What is Pompeys Pillar?

Pompeys Pillar National Monument in eastern Montana.
Pompeys Pillar in eastern Montana.
Pompeys Pillar is a butte on the Montana prairie.
The butte stands approximately 150 feet tall.

Pompeys Pillar is a 150-foot tall butte on the plains of Montana. The pillar and the cliffs that stand across the Yellowstone River is formed primarily of sandstone and shale. The butte or pillar is estimated to date back anywhere from 75 to 65 million years. Fossils and other archaeological evidence have been found here corroborating the dates.

Previous Visitors

Pompeys Pillar has a rich history. In addition to prehistoric creatures and ancient Native Americans, there has been a steady stream of callers to the landmark.

Originally part of the Louisiana Purchase in 1803, the pillar has hosted fur traders, steamboat captains, soldiers, surveyors, railroad workers, homesteaders, and the Crow Nation. Its location along the river and proximity to Billings, Montana, twenty-five miles upstream, produced a steady flow of traffic through this seemingly desolate area.

A canoe carved from a log at Pompeys Pillar National Monument
A canoe carved out of a log.

The Lewis and Clark Expedition

Pompeys Pillar is arguably most famous for its connection to the Lewis and Clark Expedition. On July 25, 1806, Captain William Clark, while on his return trip from the Pacific coast, etched his signature into the pillar leaving the only remaining visible evidence of the expedition.

Not only did Clark leave behind historic graffiti, he also made detailed notes in his journal calling it “a remarkable rock” and exclaiming it offers an “extensive view in every direction.”

A diary entry by Captain William Clark at Pompeys Pillar National Monument
One of Captain William Clark's diary entries.
Capt. William Clark's signature left on Pompeys Pillar
Captain William Clark's historic graffiti dated July 25, 1806.

Why is it called Pompeys Pillar?

While keeping a precise record of his visit, Clark also jots down a name in his journal – Pompey’s Tower.

Pompey was his nickname for Sacagawea’s toddler son, Jean-Baptiste Charbonneau. Baptiste, as he was called, was born during the expedition. Clark’s affection for the young boy inspired him to name the bluff after him. (Clark became the child’s godfather and later his legal guardian.)

The name ultimately changed to Pompeys Pillar in 1814 when Nicholas Biddle’s account of the expedition was published.

A view of the Yellowstone River in Montana
A view of the cliffs and Yellowstone River from Pompeys Pillar.

Planning a visit to Pompeys Pillar National Monument

When visiting Pompeys Pillar National Monument, prepare to do some climbing. There’s a wooden board walk that’s close to 1,000 feet long and about 200 steps leading visitors to the top of the pillar. It’s a mild incline but a decent walk, nonetheless. Pace yourself.

Captain Clark’s signature is visible on the way to the top of the mesa. On my visit, there was a guide stationed at the site of his signature to give details and answer questions.

Once at the top, we were greeted by a second guide who shared a captivating account of the land’s history, wildlife, the Native American inhabitants, and The Lewis and Clark Expedition. The gusts were steady, and our guide turned his collar against the wind as he regaled us with a moving tale of the important butte on the shores of the Yellowstone River. It was one of those tours that pulls you in and leaves you speechless when it’s over.

Tour guide at Pompeys Pillar
Our guide enthralls us with the history of Pompeys Pillar.
A compass
An example of how rudimentary the tools Captain Clark used were.

The Yellowstone River and More!

Apart from the pillar, there’s a pathway along the riverbanks. Take a stroll under the cottenwood trees and enjoy the wildlife and scenery or bring along a picnic lunch. But do adhere to the warnings on the path to avoid encounters with snakes!

In addition to the outdoor attractions, there is a gift shop and an outstanding visitors center. You’ll want to allocate enough time to enjoy the film and the exhibits in the museum in order to get the full benefit of touring the monument.

If you’re planning to stay in the area, there’s a considerable selection of hotels in Billings to the southwest. If you’re up for a more rustic experience, there are two KOA Campgrounds close by; one in Hardin, Montana and another in Billings.

The visitors center at Pompeys Pillar in Montana.
The Visitors Center at Pompeys Pillar.
The museum at Pompeys Pillar in Montana.
The museum provides a thorough account of the history of the area.
A wooded walkway
Travel the path along the Yellowstone River.

The parking lot, visitors center, restrooms, and day use area are all fully accessible. Pets are welcome but must be on a leash at all times.

Final Thoughts

Pompeys Pillar is a remote but memorable attraction. I knew very little about it when I arrived but departed with an awesome appreciation for the significance of this National Monument.

Seeing the only remaining physical evidence on the Lewis and Clark Trail was meaningful. I also gained greater knowledge and insight into the Native Americans of the region. Pairing the rich history with the expansive landscape and sweeping winds of the great American prairie makes Pompeys Pillar an unforgettable travel win.

The Yellowstone River at Pompeys Pillar
The Yellowstone River in eastern Montana.
Me at the Yellowstone River by Pompeys Pillar in Montana
Be sure to walk the river path while you're there!

Pompeys Pillar National Monument
3039 US Highway 312
Pompeys Pillar, MT 59064
(406) 875-2400

  • I visited Pompeys Pillar while attending the TBEX conference in Billings, MT. Fees for the tour were included in the registration fee. All opinions are honest and my own.

► Plan your visit now

It makes it simple to plan your trip.   We’ve pre-filled the destination from the article and if there are multiple places mentioned in the article, we’ve put the one that is best used as your base to see all of the places mentioned.

Just select I’M STAYING and enter the travel dates and hit SEARCH.  It automatically uses the first place in the article.  

For a multi-day trip, if you stay near that location, you should be able to use it as your base.

Super simple.  Just click on the pencil and enter the name of any place mentioned in the story.  Or you can enter any address or even the name of a company if you are mixing business and pleasure.

Just click I’M DRIVING and you can see how long it will take, get driving directions and even rent a car if you need one.

Yes, we guarantee the best published rates on hotels.  Click on the link for BEST RATE 110% GUARANTEE for details.

Share your experiences  

Hey pinners, save this for pinning after your trip

After you get back from your trip, please use these images to post to social media or post your own photos.  Please tag us on your post #pulloverandletmeout
 
You can also use the social sharing links on the SmartTrip tool.
 
Paws for Purple Hearts logo
Popeys Pillar National Monument
a cover picture for the Kentucky Horse Park

Hooves & History: Discovering the Wonders of Kentucky Horse Park

Since 1978, Kentucky Horse Park has been welcoming visitors to experience a one-of-a-kind equine theme park, where they can delve into the rich history of horses or even saddle up to better understand why Kentucky is known as the Horse Capital of the World. Join PullOverandLetMeOut on a journey to discover the wonders of Kentucky Horse Park.

Read More »
a cover photo for a story about Carter Mountain Orchard

Carter Mountain Orchard: Savoring the Seasons in Charlottesville, Virginia

PullOverandLetMeOut takes you to the heart of historic Charlottesville, Virginia, to the top of Carter Mountain to discover a unique orchard positioned up high overlooking the valley below, and next door to Thomas Jefferson’s beloved Monticello. Travel along to Carter Mountain Orchard and savor the seasons in Charlottesville, Virginia.

Read More »

Let’s Get Social!
Click below and join the conversation on social media

Leave a Comment

Your email address will not be published. Required fields are marked *

Scroll to Top

FREE Access to Exclusive Travel Tips and Deals

Get the latest travel news, tips & information from PullOverandLetMeOut.com!

Save on Membership with

Coupon LIFECHANGER25

don't leave empty-handed

Get your FREE Ultimate Weekend Packing Cheat Sheet

Happy Travels