The only active race track in Colorado is at Arapahoe Park in Aurora. The biggest races there are the Cherry Creek Futurity and the Mile High Derby. There are also 11 off-track betting (OTB) sites where wagering on horse- and greyhound racing is permitted. Finally, bettors can place horse racing bets online. The two main pari-mutuel betting platforms are the BetAmerica and TVG gambling sites.