In reply to ScottyG: There are several climbing walls (or gyms) in the Toronto area, the most venerable is Joe Rockheads, though some of the newer ones may be better. As far as outdoor venues, there is plenty of limestone along the Niagara Escarpment, which effectively starts at Niagara Glen (bouldering only--no ropes allowed)southeast of the city and extending over 100 kilometers northwest trough the Bruce Peninsula which juts into Lake Huron. In general the quality of the rock and climbing improve the further one travels along the escarpment--with the best crag being Lion's Head on the Peninsula over 2 hours drive from the metro area--and then a bit of a walk. Close to the city, the most popular--and longest established area, is Rattlesnake Point. It is a bit scruffy, polished, and often over-run by groups, but it is very convenient, there are a number of worthwhile routes, and it is a reasonable place to go and find someone to climb with if you are alone. Nearby are Kelso and some other crags which are more extensive, but more "adventurous" and less popular, though I've heard that there has been considerable recent activity in that area. Totally different climbing is found at Bon Echo an extensive multi-pitch--well 2 or 3-- granitic crag that rises out of a lake several hours west, boat approach is required.It is one of the older established areas in the Province,with very interesting climbing, but may well be out of fashion these days. Making contacts at the gyms should get you up-to-date information and hopefully companions for ventures further afield.