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Journal entry · August 4, 1805

Jefferson River ascending toward divide — Patrick Gass: August 4, 1805

Patrick Gass · Jefferson River ascending toward divide · Thwaites Vol. Gass 1807 First Edition

The place today: Jefferson River ascending toward divide

morning ; went about 6 miles when we came to a fork of the
river; crossed the south branch and froma high knob discov-
ered that the river had forked below us, as we could see the
timber on the north branch about 6 or 7 miles from the south
and west branches. We therefore crossed to the north branch,
and finding it not navigable for our canoes, went down to the
confluence and left a note for Capt. Clarke directing him to
take the left hand branch. We then went up the north branch
about 10 miles and encamped on it.

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The NPS atlas for this night

right side of Big Hole River, 6 mi SW of Twin Bridges, 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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