Sealy Hill (April 14, 2004 – February 23, 2021) was a Canadian Thoroughbred racehorse who won three Sovereign Awards in 2007, including Canadian Horse of the Year.
In 2013, she was inducted into the Canadian Horse Racing Hall of Fame.
In 2007, after defeating the highly regarded Panty Raid in the Bourbonette Breeders' Cup Stakes at Turfway Park in Kentucky, she finished far back of winner Rags to Riches in the Kentucky Oaks at Churchill Downs.
Back home in Canada, the filly returned to form, winning four stakes races while becoming the first-ever winner of the Canadian Triple Tiara.
[2] Casse said she was a temperamental filly who was her own worst enemy, especially in the starting gate.