Pompeys Pillar National Monument, Pompeys Pillar

#22 of 75 in Nature in Montana
Pompeys Pillar National Monument is a rock formation located in south central Montana, United States. Designated a National Monument on January 17, 2001, and managed by the U.S. Bureau of Land Management, it consists of only, making it one of the smallest National Monuments in the U.S. It was previously designated a National Historic Landmark on July 25, 1965. The new Pompeys Pillar Interpretive Center opened in 2006. Exhibits in the 5,700-square foot center relate the journey of Captain William Clark and his detachment, including Sacagawea and her son Pomp, down the Yellowstone River Valley in 1806.The pillar itself stands 150 feet (45 m) above the Yellowstone River and consists of sandstone from the late Cretaceous Hell Creek Formation, 75 – 66 million years ago. The base of the pillar is approximately 1acre.The pillar features an abundance of Native American petroglyphs, as well as the signature of William Clark, co-leader of the Lewis and Clark Expedition. Clark's inscription is the only remaining physical evidence found along the route that was followed by the expedition.
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Pompeys Pillar National Monument Reviews
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168 reviews
  • Museum is well put together. Lots of interesting displays. The museum is handicap accessible, but to view the pillar itself is not. There are quite a few steps up to see the Clark signature, but well ...  more »
  • We were passing through this area so I made a point to see this as it is the only place where Lewis and Clark really left evidence where they actually were ,Clarke carved his name here. We arrived at ...  more »
  • This is where CLARK (of Lewis and Clark) found the Yellowstone River (longest US river without a damn) and Missouri come together and where Clark carved his name in the sandstone rock. BLM has done a ...  more »
  • A wonderful little stop. Low admission but supports National Parks. Beautiful interpretive center that's immaculately clean and has great multimedia exhibits and a small give shop. Soda vending machines. It's about 220 steps up to the top, but the view is worth it. Also lots of pathways to hike along the river-perfect for letting kids burn off some energy. And a great staff of volunteers to tell you about the history of the place!
  • I had been wanting to go to the Pillar since reading "Undaunted Courage" years ago and FINALLY made it. Not a disappointment. Only drawback was a lady on top trying to convince us that Custer was NOT at fault for his defeat, very disturbing to us who wanted peace and quiet reflection for what LEWIS and Clark and the Corp of Discovery did. She should have been down below not on top. We ended up going back down before we really wanted to go. All in all I was glad to have taken this monument. Thanks for keeping this open for us.
  • Very pretty and a good stop. Clean bathrooms and it's always great to support national monuments!
  • Historical graffiti lol but seriously if your following the Louis&Clark training. Check this out and the facility is great for picnik's
  • Exciting place to see where William Clark signed his name.

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