Sonoma Raceway is proud to announce its participation in NASCAR’s first-ever In-Season Challenge, a groundbreaking new addition to the NASCAR Cup Series that will debut this summer. For the first time in its history, Sonoma will serve as one of the marquee tracks hosting a round of the highly anticipated midseason tournament, which introduces a fresh layer of competition and fan engagement to the NASCAR calendar.

The In-Season Challenge will span five weeks, from June 28 through July 27, 2025, and feature a $1 million prize for the ultimate winner. The challenge begins with a three-race seeding period to determine the top 32 drivers who will advance into a single-elimination tournament bracket. From there, each week will feature head-to-head matchups, with drivers competing to finish ahead of their designated opponent in each round to move forward in the tournament. This head-to-head format brings a new sense of urgency and strategy to the Cup Series, as only one driver from each pairing can advance toward the final showdown at Indianapolis Motor Speedway.

Sonoma Raceway will play a pivotal role in the bracket stage of the In-Season Challenge. The historic Toyota/Save Mart 350, set for Sunday, July 13, will serve as the third race of the bracket and mark a turning point in the elimination format. Notably, it will also be California’s only NASCAR Cup Series event in 2025. Known for its technical road course layout and breathtaking setting in Northern California wine country, Sonoma’s inclusion adds a unique challenge for drivers as they navigate elevation changes, tight turns, and strategic pit sequences—all while battling for tournament survival.

“This is a landmark moment for both Sonoma Raceway and the sport of NASCAR,” said Brian Flynn, Sonoma Raceway Executive Vice President and General Manager. “The In-Season Challenge introduces an exciting, high-stakes format that energizes the summer portion of the season, and we are honored to host one of the key elimination rounds here in Sonoma. Fans can expect an intense and memorable weekend of racing.”

The Toyota/Save Mart 350 will be broadcast live on TNT, with coverage beginning at 12:30 p.m. PST. In addition to the main event, fans attending race weekend can look forward to a full lineup of entertainment, interactive fan experiences, and opportunities to engage with NASCAR’s top drivers as the tournament unfolds.

Tickets, premium upgrades, camping and parking options are now available at SonomaRaceway.com or by calling (800) 870-RACE [7223].