Okay, so it's not exactly a mountain bike ride or race, but still worth showing up.
This is an event to help promote awareness of cycling in Sudbury, think critical mass...ish. Show up at Tom Davies for a 9:15 registration, ride starts at 10. The route is 26km, mostly road with 5km of real easy trails, around Ramsey Lake. BBQ to follow.
If you are looking for more info check the Bicycle Advisory Panels website.