Overlanders (1979)

The year is 1862. The settings. The Canadian northwest. The lure is gold. Nine men, two women (one of them pregnant), and a young boy begin the odyssey which is to change all their lives. Through jungle-like forests, they look for a trail abandoned 10 years before by explorers and fur-traders. It runs out in a beautiful mountain trap, a box canyon with a waterfall. Left leaderless when death strikes, the vulnerable band must find another route. They decide to descend the mighty Fraser river by raft. Those who survive the great Grand Canyon rapids must continue on foot.