The origins of the event trace back to 1977, and the race was initially called the Canadian International Marathon.

In 1984, Anne Hird won the race as winds gusted and a large field pursued her.

[10] Regularly attracting 8,000 to 10,000 participants from over 55 countries, and every Province and Territory in Canada, the event is also a major fundraiser for many charities.

[citation needed] A Runners Expo is held on the Friday and Saturday at the Queen Elizabeth building on the Exhibition Grounds immediately prior to race day and features over 60 vendors as well as the race kit pick-up for event participants.

The course is certified by AIMS and Athletics Canada meeting their measurement criteria and is re-surveyed every 5 to 10 years as required by these respective organizations.