Big Bay is simply a widening of the Piseco Outlet. This widening, however, not only gets you access to Piseco Lake, it is an excellent paddling destination in itself for a relaxing paddle and some birding opportunities.
From the intersection of Route 8 and Route 10 in Piseco, follow Route 10 toward Canada Lake. Continue for just over 1 mile to the launch area for Piseco Outlet.
The launch is a gentle slope with about 100 feet or so of portaging from your vehicle.
To get into the bay you will need to head west upstream. Do not paddle east; a small dam will block your way. At first, the waterway is a bit narrow but soon opens up to a small pond area. Continuing west you will come to where the outlet narrows and slowly exits from Piseco Lake. The nice thing about this area is that very few boats are motor equipped will make their way down this far. Several small grassy and marshy areas along the southern and western shores make for excellent birding opportunities.