Walter,
One spot in the Park, which I make a point to fish each year, is the Gardner from the old school (by the current maintenance parking yard), downstream to nearly the North Gate. I find many different specie of fish there. Out of one run, I have caught Rainbows, Browns, Cutthroats, and Cutbows on the same afternoon. Not big fish, by any means, but fun fish on dries. It also holds larger fish in the deep pools.

Fish it much in mid-July?