On 15 May 2021, in the wake of INDYCAR and Formula One cancelling rounds in Canada, Fox Sports writer Bob Pockrass sent a Twitter message saying Camping World Truck Series teams were being prepared in case Canadian Tire Motorsport Park (Mosport), in Bowmanville, Ontario, would have to be cancelled because of Canadian restrictions. Teams are expecting the fall-back plan to have the replacement race as part of the Darlington Raceway Cook Out Southern 500 Cup Series Playoff round in September if that should happen. Darlington in 2020 held their Truck Series race during the afternoon of the Sunday evening race, and already has run the LiftKits4Less.com 200 in May there, which was part of the spring Throwback race weekend.[114] On 25 May 2021, NASCAR formally announced the Mosport race would move to Darlington.[115]