On the other hand, it must be noted that horses have been running on dirt for millions of years.
A One-Horse Race For Dirt Tracks At Preakness | WAMU 88.5 – American University Radio
Horse racing on the Pimlico Race Track, like most in the United States, is a dirty affair, by definition.
Every one of this year’s Triple Crown events — including the Preakness in Maryland this weekend — will be run on dirt tracks. Some members of U.S. horse racing want to end that tradition and lay down potentially safer, though much more expensive, synthetic tracks. With grandstands increasingly empty at Maryland’s tracks, critics say track owners are putting profits over safety.