Book immediately. The Opeongo has long sections of Class 2-3 rapids, making it suitable for solid intermediates or better. The Upper Madawaska is one of the most challenging rivers in Ontario. Water levels will be very high, requiring Class 3 rock and roll paddling skills, with some Class 4 thrills for experts. The big drops can be portaged, but the river still requires advanced whitewater skills. Fully outfitted whitewater boats, and complete wetsuits or drysuits are mandatory.
Links:
[1] mailto:jneilson@nrtco.net