Visiting Pompey's Pillar National Monument, Montana

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Pompey’s Pillar is a noted natural landmark where humans left markings for centuries. The earliest are Native American petroglyphs. The reason why Pompey’s Pillar is now a protected National Monument is one significant inscription. On July 25, 1806, William Clark carved his name and date into the sandstone. He is the Clark of the famed Lewis and Clark Expedition and duly noted the rock and carvings in expedition journals. Located near the Yellowstone River, Pompey’s pillar is two acres at its base and rises 150 feet into the air. Clark had split off from Lewis in a separate detachment exploring the river. The interpretive center documents Clark’s exploration and that he noted the ancient petroglyphs. The pillar has been a unique geological formation for 11,000 years. Visitors can get up close with the pillar but the journey is a bit strenuous for some as there is a 1000 foot 200 step boardwalk from ground to the top. Halfway up is a stop to see Clark’s carving protected by a clear covering. The sandstone is riddled with markings and carvings. Signs warn not to deface and cameras watch. The view from the top is a 360 panorama of the river and surrounding terrain. The park also serves as a protected environment for Yellowstone River wildlife habitat. Pompey’s Pillar National Monument is an interesting hour break from the nearby interstate to Billings.