For an angler judging whether the fishing is worth the drive, the stocking record is the fishing report. Cottonwood Creek is a put-and-take angling fishery, stocked with catchable game fish: 21 recorded releases totalling 1,004,810 fish (Rainbow Trout, Kokanee), last stocked 1958-01-01.
Stocking appears to have wound down after 1958. Confirm whether it is still topped up or now fishes as a residual, wild population. The chart below shows the full release history.