Winterhawk

Winterhawk is a 1975 Western starring Leif Erickson (I know him best as Big John Cannon in the TV series The High Chaparral), Woody Strode, Denver Pyle, L.Q. Jones, Michael Dante, Elisha Cook, Jr (who was in an episode of Star Trek: The Original Series), Dawn Wells (better known as Mary Ann on the Gilligan's Island TV series) and Dennis Fimple.

This is a beautiful movie to watch. The plot is straightforward and interesting. The acting is good. The characterizations of both native tribespeoples and white traders and settlers avoid racist over-generalizations. Not that you should expect historical accuracy, mind you, and I found the soundtrack annoying; but it's an enjoyable modern Western.

Youtube has it with embedding disabled here.

trailer (in Italian?):

Roger Ebert likes it, saying, ""Winterhawk" is a traditional Western, simply and well told, almost old-fashioned in the clarity of its narrative." Rotten Tomatoes doesn't have any critics reviews but has an audience score of 60%. TCM has an overview and this synopsis:

The members of the Blackfoot tribe are dying from a smallpox epidemic, so their Chief Winterhawk goes off in search of a cure. On the way he is ambushed and in retaliation he later kidnaps two white men. The men come to respect Winterhawk, but a search party is hunthing for them and there is no telling what the outcome of the dangerous situation will be.