2025 NASCAR In-Season Challenge

The 2025 NASCAR In-Season Challenge presented by DraftKings Sportbook was a multi-stage motorsport tournament that was played during the 2025 NASCAR Cup Series season. It was the first edition of the NASCAR In-Season Challenge.

32 full-time drivers in the series participated in the tournament and races also counted toward the regular season and playoff standings as normal. Following the Cracker Barrel 400 at Nashville Superspeedway, 4 full-time drivers failed to make the challenge: Shane van Gisbergen, Cole Custer, Riley Herbst, and Cody Ware. Following the Brickyard 400 at the Indianapolis Motor Speedway, Ty Gibbs of Joe Gibbs Racing defeated Ty Dillon of Kaulig Racing to win the US$1 million.

The tournament consisted of eight regular season races that would run during June and July. Before the bracket was set, there was a qualifying phase where all eligible drivers compete. The bottom four full-time drivers in the standings after the phase failed to qualify for the bracket. Then, the remaining 32 drivers got seeded into the bracket based on their performance in the three qualifying races. The last five races were conducted in a single elimination bracket, with the first four rounds known as "Challenge Rounds". In each round, the driver in each matchup with the better finish advanced, while the other is eliminated. This process continued until only two drivers remain in the "Champions Round"; the driver with the better finish in that race will be the tournament champion and win a $1 million bonus. Ty Gibbs defeated Ty Dillon for the $1 million.

 O  Oval track
 R  Road course
 S  Street course

The seeding races were streamed on the new package to be shown on Amazon Prime Video.^[3] All tournament races were shown on TNT and streamed on HBO Max.^[4] TNT's sister channel truTV also aired a weekly Altcast, hosted by Larry McReynolds and Jeff Burton, alongside the main feed.