Lost and starving in Bitterroot Mountains — Patrick Gass: September 18, 1805

snow. We renewed our march early, though the morning was
very disagreeable, and proceeded over the most terrible
mountains I ever beheld. It continued snowing until 3
o’clock P. M. when we halted, took some more soup, and
went on till we came to a small stream where we encamped
for the night. Here we killed another colt and supped on it.
The snow fell so thick, and the day was so dark, that a person
could not see to a distance of 200 yards. In the night and
during the day the snow fell about 10 inches deep.