Clark's Signature

Clark's Signature

Clark's Signature is a 0.18 km historical trail at Pompeys Pillar National Monument, featuring William Clark's authentic signature carved in 1806 during the Lewis and Clark Expedition. The trail ascends 876.66 meters to the signature viewing area, offering panoramic views of the Yellowstone River valley and preserving one of the only remaining physical marks from the Corps of Discovery expedition.

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