Cut Bank Creek, like the Two Medicine River, flows from the
billion-year-old Precambrian Belt rocks, 2,000 feet thick, that
comprise the mountains known since the 1890s as the Lewis Range.
The mountains to right of center are in today's Glacier National
Park. The supposed site of Lewis's camp on July 22-25, 1806, is
on the left (south) side of the creek, left of center in the
photo. rom their camp on the north fork of the Marias River, now
called Cut Bank Creek, Lewis dispatched George Drouilliard and
Joseph Field to hunt. Reubin Field stayed with the captain.
|July 23, 1806| I directed Drewyer who went up the river to
observe it's bearings and the point at which it entered the
mountains, this he did and on his return I observed the point at
which the river entered to bear S 50 [degrees] W. distant about
ten miles the river making a considerable bend to the West just
above us. That cinched it. The Marias did not originate north of
the 50th parallel. Besides, neither hunter had any success, and
provisions were