First of all, welcome! You can check out the numerous posts here regarding clubs.....
viewforum.php?f=35How to find the best trails.........well, no easy answer. It all depends on your personal preferences and riding style. Are you looking for open rail beds, logging roads, tight twisty bush trails or mud and water? Ontario has all of these and more. Some of the areas I have ridden include 5-Points near Bobcaygeon, the Baxter club trails in Port Severn, West Algonquin ATV club trails east of Kearney, EOTA trails in and around Bancroft, Madawaska trails around Whitney and my personal favourite......Sudbury/Temagami in and around Hagar/Markstay north of Hwy 17.
This forum has died off over the years. Not sure why though. Plenty of great info to be found.
Mark