The OnlyBulls Green Flag 150 at St. Petersburg is a NASCAR Craftsman Truck Series held on the St. Petersburg street circuit, a street circuit used for the Grand Prix of St. Petersburg, starting in 2026. The race was featured along with the IndyCar Series. The race was held on the same day as the Focused Health 250 in the NASCAR O'Reilly Auto Parts Series.
Layne Riggs would take the inaugural event.
On August 20, 2025, it was announced that St. Petersburg would be featured on the 2026 schedule. It will be the first Truck Series race to be held on a street course, and the second street course that the Truck Series races at, with the other being the Coronado Street Course in July of that same year. On January 16, 2026, it was announced that the race would be 80 laps.
On February 18, 2026, it was announced that OnlyBulls would sponsor the race, making it the OnlyBulls Green FlagÃÂ 150 at St. Petersburg.