Pompeys Pillar National Monument
National Monument · Pompeys Pillar, Montana
A 51-acre monument near Billings, Montana, preserving a massive sandstone outcropping on the banks of the Yellowstone River. Its fame comes from a single piece of graffiti: the signature of Captain William Clark (of the Lewis and Clark Expedition), carved into the rock on July 25, 1806. It is the only remaining physical evidence of the Lewis and Clark Expedition visible on the trail today.
3039 US Highway 312, Pompeys Pillar, Montana, 59064, United States
Main gate/Visitor Center open 8:30 AM - 4:30 PM (May to September). Walk-in access only off-season.
Pompeys Pillar National Monument on Spottos · Explore more places on Spottos