* CastTheExpert: George "the Iceman" Woolf is played by Gary Stevens, a real-life Kentucky Derby-winning jockey.
** [[Film/SpiderManTrilogy Spider-Man]] is a horse jockey!
** And his parents are [[TheWestWing Ron Butterfield and Mary Marsh]]!
** HilariousInHindsight: Whose horse is trained by [[Film/TheAmazingSpiderMan Norman Osborn]]!
** For horse-racing fans, famous jockey George "Iceman" Woolfe is...three-time Kentucky Derby winning jockey Gary Stevens (see above.)
* RomanceOnTheSet: Tobey Maguire met his jewelry designer wife on the set.
* WhatCouldHaveBeen: The second Santa Anita race, as described in the book, is [[spoiler:simultaneously one of the greatest and most heartbreaking episodes in Seabiscuit's career]], but is missing from the movie.
* ExpectingSomeoneTaller: War Admiral is described as being 18 hands high, while Seabiscuit himself is described as being "barely fifteen hands". In reality, Seabiscuit was 15.2 and War Admiral only an inch taller at 15.3.