Hands down the best ride of the year so far:

http://www.stridemaps.com/maps/view/146#

Starting at the Aldershot GO station, it's literally about 5mins before you're in the countryside. Like birds chirping wind in the grass countryside. Not that long, but up the escarpment 4 times (~740m total climbing) the hardest being the loose gravel climb up Kelso makes up the difference. The hill down bell school line from top of Kelso is a sweet, sweet reward for the slog up the hill, you lose about 120m in 2mins. I just tucked it and hit 64.3 on L'il hauler

The scenery is awesome, the roads are good (with a few fun offroad sections thrown in on sections of the bruce trail and through Kelso), the traffic was light and considerate and the lake at Kelso is nice for a lunch stop/swim.

Lucky I broke my camera on the way out, or I'd have had to stop every 3mins because of the scenery.
Awesome ride. Highly recommended.