After passing the N. Main St. Bridge you'll come around a left bend and see the final rapid. It is a short series of ledges that might be called class II+ or even III at some flows.
At lower levels there is a line down the entire thing on the extreme river-right edge. You'll be practically against the right-hand shore until the last ledge where you'll want move center-right or center-left.
At higher levels the center or left paths can open up, but there will be several holes as well so pick your line carefully. The rapid can be easily scouted from the take-out.