For many years now, going back to at least to the time of ALMS, there's been a promo event on the Wednesday before the race, usually at Yonge-Dundas Square in downtown Toronto, though once it was at a big box store complex in Bowmanville. I don't think there was one this year, unless they somehow failed to mention it on their website.
To get a little off-topic, I didn't realize the likes of Roger Penske and Bob Holbert had been racing here in Ontario even before Mosport existed.
http://www.canadianracer.com/harewood.asp
Harewood Acres became an oil refinery, while
Edenvale is still an airfield and was in the news last week as the location of a
cancelled classic rock festival.