William Clark: July 25, 1806
I proceeded on after the rain lay a little and at 4 P.M. arived at a remarkable rock situated in an extensive bottom on the Star. Side of the river & 250 paces from it. this rock I ascended and from it’s top had a most extensive view in every direction. This rock which I shall call Pompy’s Tower is 200 feet high and 400 paces in secumpherance and only axcesable on one Side which is from the N. E. the other parts of it being a perpendicular clift of lightish coloured gritty rock. on the top there is a tolerable soil of about 5 or 6 feet thick covered with short grass. The Indians have made 2 piles of stone on the top of this Tower. The nativs have ingraved on the face of this rock the figures of animals &c. near which I marked my name and the day of the month & year.
Source: Thwaites, Original Journals of the Lewis and Clark Expedition (1904–05). Public domain.
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Pompeys Pillar, Yellowstone River, Montana in 360°
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