Clearwater was really good before temps began to drop. Still plenty of fish and the fishign should be good throughout the winter. Fish from the bank on hte north fork and downstream towards Peck. If you have access to a boat, bottom bounce eggs near the Pink House hole.
Another great spot from Pullman would be the Grand Ronde. Excellent fishery with tons of fish. Hardly any size to them though. A lot of 3-6 lbers. Good luck.