Viggo Mortensen speaks about Frank T. Hopkins' life.  American cavalryman Frank T. Hopkins (Viggo Mortensen) and his horse, Hidalgo, ran the greatest long-distance horse race ever run. Hopkins, once billed as the greatest rider the West had ever known, and his trusty mustang pitted themselves against world-renowned Arabian horses and wily Bedouin riders, who were determined to keep them from finishing the race. The contest became not only a matter of pride and honor, but a race for survival as Hopkins and Hidalgo attempted the impossible.