Unbridled (March 5, 1987 – October 18, 2001) was a champion American Thoroughbred racehorse who won the 1990 Kentucky Derby and Breeders' Cup Classic. He retired with a career record of eight wins, six places, and six shows in 24 starts, and $4,489,475 in career earnings. Unbridled had a rivalry with Summer Squall over their three and four-year-old seasons. Summer Squall defeated Unbridled in four of their six meetings.