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.