The Senator Ken Maddy Stakes is a Listed American Thoroughbred horse race for fillies and mares, two years old and older over a distance of about 6+1⁄2 furlongs on the Downhill turf course scheduled in early November at Santa Anita Park in Arcadia, California The event was inaugurated on 8 October 1969, opening day of the Oak Tree Racing Association meeting at Santa Anita Park as the Autumn Days Stakes, an allowance stakes for age three and older of either sex over the Downhill turf course at a distance of about 6+1⁄2 furlongs.
[1] The following year, in 1970 the event was run as a handicap, Autumn Days Handicap and was won by the US Hall of Fame Champion Ack Ack who carried an imposing weight of 128 pounds as top weight to victory by 1+1⁄2 lengths over Fleet Surprise.
[6] Senator Kenneth L. Maddy was elected into the California Racing Hall of Fame in 2007.
In 2017 the event was held at Del Mar Racetrack over the five furlongs distance.
† In the 1978 running of the Second Division of the event, Sweet Little Lady was first past the post but was disqualified for interference in the straight and Country Queen was declared the winner.