Being that I like to wonder about what really happened in historical films, I had been curious about what really happened in that race. I did everything I could to find out about the "real Will" and found out some interesting information. On a history of dog-sledding site it is said that the race made famous was dramatized in the movie Iron Will, was loosely based. That's an understatement. They change the hero's name from Frederick S. Hartman to Will Stoneman. It's not so bad, I love the movie it's excellent, and I suppose if they had kept the ending to what really happened it wouldn't have been so inspiring (nothing melancholy, but Frederick actually lost the race). What I like about Disney films is that they have some theme to it. Writers and English Lit teachers know what I am talking about: An inner meaning that the writers have inside the story. You see this over and over again in movies, and Disney is excellent at it.
The acting is great, the screenplay is all right, history aside it's not too bad. After all, history can be bleak sometimes, and hope springs eternal, we can always dream and imagine right? For film score fans like me, the music, which I always am interested in, is not so bad, the main theme is nice, but it's not as good as the music from Interview With The Vampire or Forrest Gump.
Bottom line, don't be taken too much by the tagline about it being a "true story;" if you do research you will be disappointed. Other than that, see it if you haven't yet. It's excellent. Just because it has hardly anything to do with the truth doesn't mean it's not a great movie.
