The scenes on the Blackfoot River were actually shot on the Madison and other rivers around the Bozeman and Livingston areas. The "Big Blackfoot" has already become too polluted and populated to provide the image the scene required.
No fish were killed or injured during the making of A RIVER RUNS THROUGH IT. The producers would like to point out that, although the Macleans kept their catch as was common earlier in this century, enlightened fisherman today endorse a "catch and release" policy to assure that this priceless resource swims free to fight another day. Good fishing.