Trinity River has tons of fish. I also suggest lake shasta if you have a boat. If you decide to fish the trinity, the best place is right below the lewiston dam. You will need a fly+clear bubble or fly rod though as it is a flyfishing only zone. Tough it out and wade all the way down. Yeah, it's hella cold but it's now summer and should be way warmer than when I went. I hear the river is full of fish right now. It's either the steelhead or salmon run right now. Not sure which tho. : / GL and tight lines mate.