What's The Most Important Prep Race For The Kentucky Derby?

That answer would be an opinion and depends upon who you ask.  East Coast trainers might point to the Florida Derby.  West Coast trainers might tell you the Santa Anita Derby.  Some might even saw the Wood Memorial at Aqueduct.  The truth is, there are so many prep races, it's hard to say what's the best.  You can throw all the statistics out the window now because of the introduction of synthetic surfaces.  There's a great website loaded with information on all the Derby prep races.  It's actually tied to a 3D game that I consider the best of all horse racing games.  Check it out at www.horseracegame.com  Here you'll find a lot of information and a lot of opinions on all the Derby prep races.