Sunday’s Toyota/Save Mart 350 at Sonoma Raceway marks the halfway point of the 2026 NASCAR Cup Series season and the opening round of the second annual In-Season Challenge, a single-elimination tournament running across five events with a $1 million prize for the winner. The 2026 Cup Series standings show Tyler Reddick entering the weekend as the points leader on 716, eight clear of Denny Hamlin, with Shane van Gisbergen sitting 17th and five points outside the playoff cutline after his San Diego DNF. The race at Sonoma, the final road course on the 2026 schedule, carries heightened stakes for nearly everyone in the field.North Carolina is one of the sport’s most important markets, home to the majority of NASCAR team operations and a fanbase that has taken to legal sports betting with notable speed since the market opened in March 2024. According to BetCarolina, an independent editorial resource covering North Carolina sports betting sites for NASCAR fans, one analyst noted: “The Sonoma race generates strong wagering volume in NC every year, and the In-Season Challenge format has added a new layer of interest. Fans are tracking both the outright winner market and the bracket matchups simultaneously, which is driving more bet slips than any single road course event has before.”The state’s seven licensed sportsbooks handled $578.1 million in May 2026 alone, with NASCAR among the most consistently wagered motor sports on the board. For bettors approaching Sunday’s race, the odds picture is unusually compressed at the top given one driver’s dominance of this style of circuit.Van Gisbergen’s Sonoma case is overwhelmingThe betting market has made its call. Van Gisbergen enters Sunday as the outright favorite at -150 to -175 across major sportsbooks, a price that reflects a track record at this style of circuit that no current Cup Series competitor can match. At Sonoma in 2025, he started from the pole, led 97 of 110 laps, and won by a margin that made the result feel routine. His only Cup win of 2026 came at Watkins Glen, where he repeated a similar performance. On road and street courses this season he has five top-ten finishes in six starts, the exception being the San Diego DNF that dropped him below the Chase cutline.”There is no version of this weekend where you take SVG lightly,” one analyst said. “He started from the pole in San Diego and was running third before the Lap 32 incident took him out. His pace was exactly what you expected. Sonoma rewards all the things he does better than anyone in the field: braking precision, late-apex entry, and the ability to build a gap before the field can organize a response. The -150 price is not generous, but it is not wrong either.”The lone caveat is that van Gisbergen has never previously completed a full Cup Series event at Sonoma. His 2025 win was his debut at the circuit, and while he dominated from wire to wire, race-specific track notes accumulated over years of appearances do occasionally matter in qualifying and early pit strategy. Every other contender on Sunday will arrive with multiple laps of data from previous editions of this race.Larson’s Sonoma case is equally compellingKyle Larson has not won in 2026. That sentence still does not make complete sense given that the reigning Cup champion has led 608 laps this season, posted seven top-five finishes, and entered Sonoma riding a run of four top-fives in his last five races including a third in San Diego. His average starting position at Sonoma across 11 Cup starts is 4.5, the best among all active drivers. He is a two-time winner at the circuit, with two victories and four poles.Current odds have Larson at +900, which projects an implied win probability of roughly 10 percent. Several analysts covering the race have flagged this as the most attractive number on the board for bettors willing to back something other than the chalk. His road-course form in 2026 includes a win at Watkins Glen on May 10 where he came from 26th to lead in 18 laps. That was the performance of a driver operating at championship-caliber levels on technical circuits, not someone who has won here twice by accident.”Larson’s starts at Sonoma tell you something fundamental about how quickly he can get on top of a technical layout,” one data analyst said. “A 4.5 average starting position across 11 races means he consistently puts the car where it needs to be in the most compressed, highest-information moment of the weekend. That translates to race pace. You rarely see a driver that good in qualifying fade when the green flag drops on the same circuit.”The Zilisch factor and In-Season Challenge dynamicsConnor Zilisch is the wildcard the odds market has not fully resolved. At +700 to +850, the 19-year-old Trackhouse prospect arrives at Sonoma as the defending winner of the O’Reilly Auto Parts Series event at the same circuit and fresh off winning the inaugural Cup race at Naval Base Coronado the previous weekend. That San Diego win was only his 13th Cup start. The official Sonoma Raceway event page confirms his In-Season Challenge bracket draw pairs him against Bubba Wallace in Round 1, a favorable matchup that sets a potential second-round collision with van Gisbergen.Tyler Reddick at +850 and Ryan Blaney at +1200 round out the realistic top-five candidates, with Chris Buescher, AJ Allmendinger, Michael McDowell, and Chase Elliott all holding legitimate finishing position value further down the board. Buescher in particular has averaged the best finishing position at Sonoma among full-time regulars in the Next Gen era, a fact that tends to escape casual attention given his lack of a win at the track.Betting the raceThe race sets up in one of two broadly different ways. In the first, van Gisbergen qualifies near the front on Saturday afternoon, builds an early gap, and manages tire wear well enough to maintain position through the final restart window. That is the version the odds board is pricing as most likely. In the second, a mid-race incident or strategy call disrupts his expected track position and the race becomes a Larson-versus-the-field contest in the closing stages.For outright bettors, the decision is whether -150 on SVG is acceptable given the known variance in road-course racing, where a single incident can erase a 10-second gap instantly. The +900 on Larson represents the most defensible alternative, given his documented record at this specific circuit and his form over the past five weeks. Zilisch at +700 to +850 has the upside profile but is pricing a driver who has made 13 Cup starts into the top tier of a stacked field. That is a more speculative case.For finishing position props, Buescher to finish top 10 and McDowell to finish top 10 have both drawn analyst attention this week, with McDowell averaging a top-eight result at Sonoma in the four most recent editions of the race. Both prices offer better implied value than their outright odds suggest.The Toyota/Save Mart 350 goes green at 3:30 p.m. ET on TNT Sports. If you are placing wagers in North Carolina, you must be 21 or older and physically located within state lines. All seven licensed sportsbooks are available on mobile, with NASCAR markets including outright winner, top-three finish, and same-race parlay options across the board. Bet responsibly. If you need support, call 1-800-GAMBLER or visit morethanagame.nc.gov.
