I particularly liked this movie. The length is fine because there is room to build the characters of the movie and the fire scenes are impressive. I own the Region 1 DVD that has some production notes but strangely enough the trailer that is announced on the back cover of the DVD is not included.
There was a short piece on the making of the movie in a Dutch magazine of that time that had a picture of John Wayne drving in a special terrain buggy on the set, the particular vehicle is not even in the movie. I too think Katherine Ross was good in her part, and Jim Hutton is believable as co-star.