The Breeders Crown Open Mare Trot is a harness racing event for three-year-old and older Standardbred mare trotters. It is one part of the Breeders Crown annual series of twelve races for both Standardbred trotters and pacers. First run in 1986, it is contested over a distance of one mile. Race organizers have awarded the event to various racetracks across North America. The 2017 race will be held at Hoosier Park in Anderson, Indiana, United States.