You can bet on the Kentucky Derby online through several trusted and legal horse racing betting platforms. The top options include:

• FanDuel Racing : Available in 28 states, FanDuel Racing offers a $500 no-sweat first bet for new users, allowing you to bet up to $500 and get your stake back as bonus credit if you lose. It also provides live streaming and quick race result updates

• TwinSpires : The official online wagering partner of the Kentucky Derby, TwinSpires allows you to bet on the Derby from your computer or mobile device. It offers a promo code "CBSSPORTS" that gives up to $400 in bonus funds and provides live streaming of the race. TwinSpires is known for its advanced betting tools and secure wagering environment

• 1/ST BET : Another option with a promo code "250BET" offering up to $250 in bonus bets. It is suitable if you want to wager smaller amounts compared to TwinSpires or FanDuel

To bet, you need to register an account on one of these platforms, enter any promo codes to unlock bonuses, select the Kentucky Derby race, choose your wager type and stake, then confirm your bet

. If you prefer to bet in person, the Kentucky Derby is held at Churchill Downs in Louisville, Kentucky, where you can place bets at the track on race day

. In summary, the best places to bet on the Kentucky Derby online are FanDuel Racing, TwinSpires, and 1/ST BET, with TwinSpires being the official partner and FanDuel being the most popular sportsbook in the U.S. for this event