This surprisingly good run is located just the other side of the Sacramento river from Red Bluff. The whitewater consists of nearly continuous class II-III rapids and a class IV rapid, tapering off near the end. Scenery and solitude are good, so it is surprising that this river didn't make it into any guidebook. This run is superior in all respects to Stony Creek and Cache Creek, although further from population centers.
Rapids are numerous, water quality is good, playspots are plentiful, and the season is long.
This description below was compiled at 835 cfs, apparently a base flow during spring runoff after many rainless days. A run would be possible at higher flows. Watch out for a brush-choked drop at a R bend about 1.5 miles down. At the confluence, the N Fork approximately doubles the flow. The N Fork is subject to diversions, and its trees are closer to the river than on the S Fork.