I think - but don't have any official info - that it was a combination of things.  The road had seen heavy use in previous years, frequently run twice per year for rallies, and some competitors were getting a bit tired of it.  It had earned a reputation as a bit of a car breaker, although the last year it ran, it was in the best shape I can remember.

I don't think it will be back anytime soon because of the condition of the road.  It's a shame, it's a really cool road.  Great challenge for the drivers, some excellent spectating locations, and the lock at the top end had some of the most beautiful scenery I've ever seen.

Is this the same ontario performance rally event I saw in around Simcoe in the summer of 2001?  If so, excuse my forgetful-ness of the event name.  That's too bad, cause it close compared to any of the other events I've went to.