The field for the Kentucky Oaks, the filly equivalent of the Kentucky Derby, is limited to fourteen horses, with up to four "also eligible" horses in case of a late withdrawal from the field.
The 30 races in the Road to the Kentucky Oaks were held from September 2020 (when the fillies were age two) through April 2021 (when they had turned three).
The top four finishers in the specified races earn points, with the highest point values awarded in the major preparatory races held in late March and early April.
Earnings in non-restricted stakes act as a tie breaker.
For 2021, the Road to the Kentucky Oaks instead reverted to schedule for the 2019 Road to the Kentucky Oaks, except as follows: For the first time, points will not be awarded to horses that have been administered furosemide (Lasix) on race day.