Bill Clinton

“ By the President of the United States of America
A Proclamation
Pompeys Pillar National Monument is a massive sandstone outcrop that rises from an almost two-acre base on the banks of the Yellowstone River 150 feet toward Montana's Big Sky, east of Billings. The monument's premier location at a natural ford in the Yellowstone River, and its geologic distinction as the only major sandstone formation in the area, have made Pompeys Pillar a celebrated landmark and outstanding observation point for more than eleven thousand years of human occupation. ”

“ The name was changed to Pompeys Pillar by author Nicholas Biddle when his account of the Expedition was published in 1814.
Ethnographic and archaeological evidence indicates that the Pillar was a place of ritual and religious activity. ”

“ In his journal, Clark named the rock Pompy's Tower, Pompy being Clark's nickname for Sacagawea's young son, Jean Baptiste Charbonneau, who was born at the expedition's winter camp at Fort Mandan on February 11, 1805. ”