The Endeavour Stakes is an American Thoroughbred horse race held annually in February at Tampa Bay Downs racetrack in Oldsmar, Florida. Raced on turf over a distance of 1 1⁄16 miles (8.5 furlongs), it is open to fillies and mares, aged four and older.Inaugurated in 2000 at a distance of 1 1⁄8 miles (9 furlongs), in 2004 the race was modified to its present 1 1⁄16 miles.Known for a time as the Endeavour Breeders' Cup Stakes, the race was elevated to Grade III status in 2008.