Desc: The Runner: Extreme UltraRunner David Horton: Directed by J.B. Benna. With J.B. Benna, David Horton. THE RUNNER follows Extreme UltraRunner David Horton as he runs more than 40 miles per day for 66 consecutive days in an attempt to set the speed record on the 2,700 mile Pacific Crest Trail from Mexico to Canada. An epic adventure of human endurance.