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Journal entry · August 11, 1805

Jefferson/Beaverhead River near present-day Dillon — Patrick Gass: August 11, 1805

Patrick Gass · Jefferson/Beaverhead River near present-day Dillon · Thwaites Vol. Gass 1807 First Edition

The place today: Jefferson/Beaverhead River near present-day Dillon

set out until after breakfast. Three hunters were sent out
and we proceeded on about 3 miles, when we came to a large
island, which is 3000 miles from the river Du Bois at the
mouth of the Missouri. We therefore called it 3000 mile
Island. We took up the South side of it, and had difficulty
in passing the water being shallow. About 2 some rain fell.
Our hunters killed 3 deer and a goat. We went 14 miles and
encamped on the North side.
124 GASS’S JOURNAL OF THE

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The NPS atlas for this night

island near the west side of Beaverhead River, 6½ mi NE of Dillon, MT

NPS campsite reconstruction (Bergantino)

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From the NPS Lewis and Clark National Historic Trail Park Atlas, mirrored here on September 21, 2026. This copy is not authoritative; NPS remains the system of record. About the mirror

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