I finally tracked down a copy of the Mont Tremblant Track which has always been a favourite of mine as it was the first GP I saw (kinda dates me there).
I like the track, but was a bit disappointed that the background was rather mundane. I set out to use Google Maps (and intrigued that the south loop is a bit short) to put the track in context. I aligned it to fit and added in the corner names. There is also a area called "the hump". Not a corner, but a area where the elevation drops noticeably and many cars have gone airborne and off; I added a hazard zone marker for the Hump (I thought to reflect it, cars landing after the hump but before the next corner could be forced to move two spaces further to reflect the hazard).
So here's my dilemma. The track bit I didn't draw. I don't know who did. All the background is either Google maps or some free clip art and images.
I would love to post the map for others, but I think the BGG forum rules prohibit that.