The Boreas River is a classic Northcountry river.
Just below the route 28N bridge put-in, the water flows peacefully though a boreal forest. The pace picks up, and suddenly you find yourself in a challenging zig-zag rapid (IV) which constricts into an exit hydrologic. Immediately downstream is a waterfall (V), which can be scouted (and/or carried) on the right.
Minor rapids lead into a substantial section of flatwater. Just when you're beginning to wonder when it will end, the riverbed tilts downward. Get ready, because the next several miles has some of the most continuous creeking rapids (IV) in the Adirondacks. When you reach the North Woods Club Road bridge, you can take-out here, or continue another mile of rapids (II) to the Hudson River.
If you're not into the continuous set of Class IV rapids, you might be interested in the
Upper Boreas.