Pompeys Pillar National Monument, Montana

Pompeys Pillar National Monument is a nature heritage site in Yellowstone County, Montana. The site protects a rock formation and its surrounding terrain. Covering just 51 acres (21 ha), it is one of the smallest national monuments in the United States.

Pompeys Pillar is a sandstone formation above the Yellowstone River. It is 150 feet (45 m) tall, and was formed some 75-65 million years ago. Its base covers an area of about an acre (0.4 ha). The formation holds numerous petroglyphs left behind by early Native American, as well as the graffiti of William Clark, the co-leader of the Lewis and Clark Expedition on 25 July, 1806. It was Clark who originated the name Pompys Tower for the formation. The name was modified to Pompeys Pillar in 1814.

Pompeys Pillar National Monument, Montana
Source: https://commons.wikimedia.org/wiki/File:Pompeys_pillar_boardwalk.jpg
Author: Larry D. Moore

Visiting Pompeys Pillar National Monument, Montana

Pompeys Pillar National Monument is about 25 miles northeast of Billings, Montana. From Billings, take Interstate 90 until Exit 456 and continue on Interstate 94, turning off at Exit 23. Then continue on US Highway 312 heading west till you see the entrance to your right. You can see Pompeys Pillar from the junction leading to the site.

 Latest updates on Penang Travel Tips

About this website

Dear visitor, thank you so much for reading this page. My name is Timothy Tye and my hobby is to find out about places, write about them and share the information with you on this website. I have been writing this site since 5 January 2003. Originally (from 2003 until 2009, the site was called AsiaExplorers. I changed the name to Penang Travel Tips in 2009, even though I describe more than just Penang but everywhere I go (I often need to tell people that "Penang Travel Tips" is not just information about Penang, but information written in Penang), especially places in Malaysia and Singapore, and in all the years since 2003, I have described over 20,000 places.

While I try my best to provide you information as accurate as I can get it to be, I do apologize for any errors and for outdated information which I am unaware. Nevertheless, I hope that what I have described here will be useful to you.