A perfect preview for the Kentucky Derby this weekend is the Kentucky Oaks race tonight at Churchill Downs.

What is the Kentucky Oaks? It’s a race made up of 14 of the best 3-year-old fillies in the world and begins at 5:51 p.m. ET on Friday, May 3.

Leslie’s Rose has the best odds to win the Oaks at 4-1, followed by Ways and Means and Thorpedo Anna at 5-1 odds each.

So how do you get in on the action of the Kentucky Oaks? Check out our list of the best horse racing betting bonus codes and offers, all of which can be used on the Kentucky Oaks.

FanDuel Sportsbook comes to the table with two great welcome offers! The offers differ for bettors in different states.

In AR, CA, DE, ID, FL, MN, MT, NH, NM, ND, OR, RI, SD, and WA, new users can get a $500 no sweat first bet. If your bet loses, then you get back the amount wagered as a racing credit that expires in seven days. This offer is available in all FanDuel states, but you can only use it if you have never placed a bet on any FanDuel property.

In AZ, CO, IL, IN, KY, LA, MA, MD, MI, NY, OH, PA, VA, WV, and WY, you can claim a $20 no sweat first bet only for the Kentucky Derby. This offer applies to new and existing customers and if your bet loses, you’ll get the amount wagered back as a racing credit. The racing credit expires on June 10, which means you can use it on the Preakness or Belmont Stakes.

You must be 21 to access either of these offers in Arizona, Indiana, Iowa, North Dakota, and Washington.

Age and residency restrictions apply. See terms at racing.fanduel.com. Gambling Problem? Call 1-800-GAMBLER.

TwinSpires, whose name is based off the iconic spires at Churchill Downs, is also showcasing a fantastic welcome offer.

You can get a $400 sign-up bonus with 4x rollover on TwinSpires. You’ll get $100 of your bonus bets for every $400 you wager, so you have to bet a total of $1,600 in your first 30 days to get the full $400.

This offer applies to bettors in AL, AZ, AR, CA, CO, CT, DE, FL, ID, IL, IA, KS, KY, LA, MD, MA, MI, MT, NH, NY, ND, OH, OK, OR, PA, RI, SD, TN, VT, VA, WA, WV, WI, and WY.

Create your new wagering account with TwinSpires.com and earn a $400 sign up bonus! Must use promo code on registration to be eligible. Valid for one use per household. $400 bonus cash will be credited in increments of $100 for every $400 wagered. To earn the full $400 bonus players must wager $1600 within 30 days of creating a TwinSpires account. Completed wagers mean that the race has run and the results are official. This sign up offer cannot be combined with any other registration bonus offer. Certain exclusions apply. All management decisions final.

DRF Bets is awarding new users a $200 deposit match instantly. This means that if you deposit $200, you would get $200 in bonus funds to use for seven days.

The DRF app is available in Alabama, Arizona, Arkansas, California, Colorado, Connecticut, Delaware, Florida, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maryland, Massachusetts, Michigan, Minnesota, Montana, Nebraska, New Hampshire, New Mexico, New York, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Dakota, Tennessee, Vermont, Virginia, Washington, West Virginia, and Wisconsin.

New players only, 21+. Gambling Problem? Call 1-800-GAMBLER. Full T&C apply.

The new customer offer from AmWager lets you get a 100% first deposit match up to $150.

New users only. Must be of legal age in the relevant jurisdiction to open a wagering account. Full T&C Apply.