LAST EDITED ON Jun-03-08 AT 09:19PM (MST)[p]backpacker,
Both. Your best shot at a "big" fish is if one moves up from Deer Creek into the river.
I caught a 26" brown a couple of years ago right below the Jordanelle dam, but you're gonna have to fish really hard and long to break 18" up there now.
Down towards Deer Creek there is always the chance to hook into something huge-like a carp ;-) Throughout the winter there's usually some decent rainbows that move up, but the browns in that stretch have really taken a beating with all of the silt, fungus, etc....... Still could hook into something big in this area-I've even caught walleye on the fly rod around the Charleston bridge!
There is great access on both the middle and lower. It's been yuppified pretty good-even have toilets all over the river...
Pretty much all of the upper is now closed to the public. It use to be my favorite section. There's some decent fishing just above Jordanelle if you like "campground" fishing.
The "raft hatch" on the lower is always good for some good clean summer entertainment. Nothing like an innertube and a bunch of snow-white BYU students....
If you're coming to fish for fish, come in the winter. The colder and snowier the better. Bring the streamer box and leave the bobbers and nymphs for the Green.