Pompeys Pillar National Monument

Pompeys Pillar National Monument
Location	Yellowstone County, Montana, USA
Nearest city	Billings, MT
Coordinates	45°59′43″N 108°00′21″W / 45.99528°N 108.00583°W / 45.99528; -108.00583
Area	51 acres (21 ha)[1]
Established	January 17, 2001
Visitors	50,000 (in 2002)
Governing body	U.S. Bureau of Land Management
Website	Pompeys Pillar National Monument

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.