Horses, riders and runners crossed three streams in the course of their 22-mile race through the hills of central Wales. The average finish time was the same for both species — four hours. Ryan Kellman and Adam Cole/NPR's Skunk Bear hide caption

itoggle caption Ryan Kellman and Adam Cole/NPR's Skunk Bear

American Pharoah and trainer Bob Baffert at Belmont Park in Elmont, N.Y. American Pharoah will try to become horse racing's first Triple Crown winner since 1978. Seth Wenig/AP hide caption

itoggle caption Seth Wenig/AP

Tonalist (left) with Joel Rosario up edges out Commissioner with Javier Castellano up to win the 146th running of the Belmont Stakes horse race. Triple Crown favorite California Chrome tied for fourth place with Wicked Strong. Matt Slocum/AP hide caption

itoggle caption Matt Slocum/AP

Goldencents training at Churchill Downs on May 1, 2013. Note: Due to an error in information provided by Getty Images, the original image with this post was of Golden Soul during one of its training sessions. We removed that image at 9:25 a.m. ET on May 5 and replaced it with this photo. Andy Lyons/Getty Images hide caption

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This picture has stayed in Noah Adams' mind. Dr. Kim Sprayberry/Hagyard Equine Medical Institute hide caption

itoggle caption Dr. Kim Sprayberry/Hagyard Equine Medical Institute