From NetFlix:

    Viggo Mortensen stars as Frank T. Hopkins, reputed to be
    one of the best riders of the Wild West. His chance to
    prove his talent comes when an affluent sheik invites
    him to join one of the most outrageous and grueling
    races of all: a 3000-mile trek across the Arabian
    Desert. Previously open only to those who ride Arabian
    horses, the event allows Hopkins to join with his
    Mustang, Hidalgo. Can they win?

Goosebumps and more goosebumps! “Hidalgo” is not just a
western. It’s a feel-good, an adventure, and almost a
sports movie (horse-racing). The story is true. In fact
there is a Frank T. Hopkins WEB site.

Viggo Mortensen has proven himself an adaptable actor
(Good,  Appaloosa, Eastern Promises, A History of Violence,
Lord of the Rings, 28 Days). He speaks 4 languages
fluently and 2 others acceptably.

As I have said, a good western has to have good guys
and bad guys. “Hidalgo” has some great villains including
a beautiful British woman who continually speaks through
her nose and plots evil deeds.

Underlying the entire film is a clash of cultures: U.S. Army
versus the Sioux indians, British versus American, Cowboy
versus Bedouin.

Be prepare for a few sobs as well.