I will try to be polite in saying that alot of folks on this site are less than forthcoming when it comes to offering fishing places. I would suggest that you start up by Palmer at the State Park, there's a lot of good water up there, then work your way down toward Flaming Geyser. If you're willing to walk down to the river you could even try fishing below the bridge on Hwy 169, between Enumclaw and Black Diamond. This river has seen alot of abuse from the floaters with garbage all over the place, I fished just above the Whitney bridge last weekend only caught fish in the 4" range. There's got to be bigger ones in there where it's hard to get too, so instead of right out telling you where to go. I'd say hiking for it would be your only option, for finding bigger fish. Hope this helps.
JB