South Puget Sound, awesome cutt fishing, Naselle, Willapa, N. River, Smith Cr.(Pacific Co.) all have large pop. of cutts. The Chehalis I would include but it will not be fishable this winter and maybe not next year, the whole upper water shed was just about destroyed in the dec. flood. It's running mud at Chehalis and with all the slides up above it won't clear up. The Newaikium was badly affected also.
The searun cutt is the best fly rod fish around, very agressive to a fly and put up a great fight once hooked.
Deschutes has been awesome this year. My little brother was hooking or getting a bite on almost every swing just a week ago. Im thinking about skipping steelhead for a day and fishing cutts. Oh ya, there are a few native steelhead right now as well. When I say a few, that what I mean though, lol.
Do the research and you will soon find the access points. Try around Hartstene Island, Nisqually Reach, Squaxin Island and most parts of the lower PS have some of the best areas. If you have a small boat pick your day and stick close to the shore, you will soon find the spots that are productive. If you don't have a boat there are plenty of public access points that are producitve as well. Tolmie State Park, Hartstene Island bridge area, Kennedy creek area, Kamiliche creek area, Deer creek area, Johns creek area. Most any area that has a salmon spawn will interest cutts as the smolts are now returning to the salt. Don't overlook Hood canal either.
Many years ago I used to sit under the old highway bridge at Perry Creek, just slightly north of Mud Bay on Highway 101, and chucking spinners or plunking eggs would fill up a creel pretty quick with cutts. Using bug whipping gear with streamers also worked.