We ran a little string for a while in the 70’s when they were great tax shelters. 20 horses is an abomination, they should be ashamed of themselves.
Q: How many horses can start in the race?
Currently a maximum of 20 horses can run in the Kentucky Derby. The largest field was 23 horses (1974) for the 100th running of the Kentucky Derby. The smallest field was just 3 horses (1892 and 1905).
https://www.drf.com/derby-watch