Explanation:
Bears on the Lewis and Clark Expedition
It was the largest bear they'd ever seen, a great grizzly bear that weighed an estimated 600 pounds.
The first grizzlies Lewis saw during the expedition were two smaller bears. He and another hunter had easily killed one of them
As he was watching the buffalo fall, a grizzly bear came rushing towards him.
On July 15, 1806, Hugh McNeal was out alone on horseback. All of a sudden he saw a grizzly bear in the bushes. His horse bucked and threw McNeal near the bear.
They saw 5 bears on their journey.
SO YOUR ANSWER IS 5 BEARS