In Ontario, amateur competitors race at Canadian Tire Motorsport Park and Calabogie Motorsport Park to earn points towards the regional titles.

• July 17-18 - BARC Canadian Touring Trophy Races - Canadian Tire Motorsport Park
• August 21-22 - OSCC Calabogie Summer Classic - Calabogie Motorsport Park
• September 18-19 - BEMC Late Summer Trophy Races - Canadian Tire Motorsport Park
• October 2-3 - Celebration of Motorsport - Canadian Tire Motorsport Park

Championships are contested in the following categories:

• Grand Touring Category – The Grand Touring division is for race-prepared production vehicles. The cars competing in this category are prepared to similar rules. Some of these vehicles may be constructed with a tube-frame chassis. They are grouped according to their performance (based on the bracket that a car/driver combination performs). The quickest class features cars such as the Ford Mustang and Chevrolet Corvette, while at the other end of the spectrum are vehicles such as the Honda Civic and Volkswagen Rabbit. The Ontario Region offered Grand Touring competitors two different formats of racing:
  • GT Challenge – The GT Challenge series is a one-hour contest on Saturday that requires a pit-stop. This style of racing allows two drivers to share a car in a single event.
  • GT Sprints – Vehicles in the GT Sprints are categorized from GT1 to GT5 depending on their performance. A weekend of competition includes three races twenty-minutes in length.
• Formula Category – These are purpose-built race cars. This is the largest category and there are a variety of regulations that govern these open-wheel cars.
  • Formula 1200 - Uses Volkswagen components and is powered by a 1200-cc air-cooled engine.
  • Formula 1600 (F1600A and F1600B) - Utilize the four-cylinder 1600-cc Ford motor or the Honda 1.5-liter engine with older chassis’ competing in the B category. Drivers score points towards the Toyo Tires F1600 Championship.
  • Formula Libre is a race group that includes many classes; some of the more popular are:
    • Formula First - Utilizes Volkswagen parts but is powered by a 1600-cc air-cooled motor.
    • Formula 2000 - These winged vehicles use a 2.0-liter Ford four-cylinder power-plant.
    • Formula 4 – Is another winged class with the most liberal rules.
    • Radical – These are purpose-built closed wheel sports racing cars.
• Vintage Automobile Racing Association of Canada – Also competes at CASC-OR weekends and have several classes depending on the age and type of vehicle. Categories include open and closed wheel Historic/Vintage as well as Classic.