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Pompeys Pillar National Monument

Pompeys Pillar National Monument is located on the banks of the Yellowstone River, 30 miles east of Billings, Montana’s largest city. The Monument was established in 2001 to protect the only remaining physical evidence of the Lewis and Clark Expedition: Captain Clark’s signature, which he carved into a 150-foot sandstone butte on July 25, 1806. In his journals, Clark named the Pillar “Pomp’s Tower” in honor of the infant son of Sacagawea, the Shoshoni woman who accompanied the expedition and contributed greatly to its success. The historic signature remains today, and visitors can walk on a boardwalk to see it.

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Upper Missouri River Breaks National Monument

The Upper Missouri River Breaks National Monument is nearly 370,000 acres of central Montana prairies and badlands, with 149 miles of Wild and Scenic Missouri River flowing through it. These lands have remained largely the same since Lewis and Clark came through in 1805 and described “scenes of visionary enchantment” along the Missouri.