charity rides in Ontario

I was pleased to see a thread for charity rides. I want to try a few this year and wondered if any of you from southern ontario know of some good weekend rides. (southern ontario I consider anyplace south of Barrie). I am from the North Bay area, and haven't found any here, probably I am not searching properly, thanks for any ideas

other than your local bike club or LBS check out

www.goodcyclist.org

largest list of charity road rides I've found. if there is one...it'll be there.