The 2025 NASCAR Canada 300, also called the Riverside 300, was the second stock car race of the 2025 NASCAR Canada Series. The race was held on Saturday, June 28, 2025, at Riverside International Speedway, a 0.333 mi (0.536 km) oval shaped racetrack in James River, Nova Scotia, Canada. The race took the scheduled 300 laps to complete. The race was won by D. J. Kennington, driving for DJK Racing, after he started on pole and led the most laps. Will Larue, driving for Larue Motorsports, finished in second, and Ryan Vargas, also driving for DJK Racing, scored his first career podium in third.
Riverside International Speedway is a 0.333 mi (0.536 km), high banked, asphalt short track located in James River, Nova Scotia, Canada, about 10 km (6.2 mi) southwest of the town of Antigonish.
The first and only practice session took place on Saturday, June 28, at 1:30 PM AST and lasted for 45 minutes. Donald Theetge would set the fastest time in the session, with a lap of 14.658 seconds with a speed of 81.785 mph (131.620 km/h).
Qualifying was held on Saturday, June 28, at 7:00 PM AST. D. J. Kennington, driving for DJK Racing, would win the pole with a lap of 14.562 seconds and a speed of 82.324 mph (132.488 km/h).