The Toronto Ride is coming up this
Saturday June 15th, while it has traditionally not been a "youth" ride, it has exhibited some youthful damsels willing to show their all, and is worth looking forward to.
If you can make it as either a rider or courteous photog, or snapper,(remember Toronto is full of Canadians)

these are the basic instructions from the Toronto WNBR 2013 website.
Time: Gather at 12 noon for socializing, body painting, bike decorating etc. Bring food to share if you wish. Ride starts at 1 pm, following a route along several major streets in the downtown core.
Location: It starts at Coronation Park (by the waterfront at the centre of the park)
Full details, some videos, and pictures from previous rides are on the website:
http://www.worldnakedbikeridetoronto.com/
Unlike New York, and most other US cities, being nude in public is not illegal in Toronto. Technically, I have been told, you have to wear some item like shoes, or a hat, to be fully legal. But, the Toronto police haven't ever been that picky with the riders.