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Pompeys Pillar National Monument, Pompeys Pillar

(130+ reviews on the web)
Geologic Formation
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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Reviews
TripAdvisor
  • We pulled off the freeway, ate lunch from our cooler, and went for a little walk into the interpretive center and up Pompeys Pillar. It's a short and easy walk to where we saw the famous carving in th...  more »
  • Physical evidence of the great L & C journey. There is an entrance fee and maybe not all that much to see. On the other hand, it's a very historical site with a nice visitor center and a few short hik...  more »
  • This was a delightful stop on our travels across Montana following Lewis and Clark. The displays were very interesting as was the movie shown. We climbed to the top of the pillar to see Clark's signat...  more »
Google
  • Open 8am-6pm May through September with a $7 entry fee per vehicle (can use National Parks Pass). The rest of the year the monument is still open, no fee, but it is about a one mile walk from the entrance gate. Totally worth a stop if you're in the area, interesting history, beautiful walking trails, and gorgeous views from the top.
  • Excellent views with nice walking trails. Lewis and Clark rock
  • It's gorgeous. Info Center has great information and replicas.
  • The views from the top are worth every step of the climb. The steps are many but not too steep. You can see for miles and see lots of wildlife. If you're lucky the marmots will entertain you. We went in May and it was beautiful.
  • Great views and the history of Lewis and Clark there in 1806. We will be back in the summer.