Pompeys Pillar National Monument

Yellowstone County, US

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 in conjunction with The Friends of Pompeys Pillar, it consists of only 51 acres (21 ha), making

it one of the smallest National Monuments in the U.S. The community of Pompeys Pillar lies just east of the monument.

Listen to the audio guide for Pompeys Pillar National Monument Free on WIP — starts by itself when you arrive, even with the screen off