Nice twisty road, not very long (20min) but fun nonetheless :)

I golfed carlisle a few weekends ago and discovered this little stretch.

Go north of the 407 along Appleby, There are a few roads there that are so fun they post fatality signs...

Another good one is the Forks of the Credit.. Caledon, north along hwy 10.. which also posts fatality signs, and features hills that peak so sharply, your car can easily pull airtime..

I think the best roads are the ones where people die =)