The Endeavour Stakes is a Grade III American Thoroughbred horse race for fillies and mares that are four years old or older, over a distance of 1+1⁄16 miles on turf, held annually in February at Tampa Bay Downs racetrack in Oldsmar, Florida.

The event was inaugurated on 4 January 2000 at a distance of about 1+1⁄8 miles and was won by Office Miss by the shortest of margins, a nose over Seducer in a time of 1:48.93.^[1]

In 2004 the event was decreased to its present 1+1⁄16 miles.^[2]

The event was upgraded to Grade III status in 2008.^[3] That year's winner, Dreaming of Anna, was the 2006 Eclipse Award Juvenile Filly champion.^[4] The 2012 Endeavour winner, Zagora, went on to win the Breeders' Cup Filly and Mare Turf and the Eclipse Award in that category.^[5] The 2016 winner Tepin was named US Champion Grass Mare in both 2015 and 2016 and won the 2015 Breeders' Cup Mile.^[6]

Speed record:

• 1+1⁄16 miles: 1:40.26 – My Lordship (2006)
• about 1+1⁄8 miles: 1:48:48 – Cybil (2001)

Margins:

• 4 lengths – Dona Bruja (ARG) (2018)

Most wins:

• No horse has won this race more than once.

Most wins by an owner:

• 2 – Lael Stable (2019, 2020)

Most wins by a jockey:

• 3 – John R. Velazquez (2007, 2017, 2021)

Most wins by a trainer:

• 4 – Chad C. Brown (2012, 2016, 2021, 2022)

• List of American and Canadian Graded races