This is a good time to hit the smaller creeks like Tumalo Creek and Whychus Creek. Tumalo is the much better of the 2 fisheries. Tumalo Creek  access through Shevlin Park is cool and my favorite places are up from Skyliners Road to the Falls. Simple flies like a Renegade, Elk Hair Caddis, Orange Missing Links, Parachute Adams and Purple Haze and Terrestrials like Ants and Beetles. Nymphing a Frenchie, PCP, Zebra Midge and Flashback PT or an Olive Perdigon with an Orange Hot Spot. A dry dropper rig is great with the nymph set just about 20” inches off the bend of the dry. You can also tightline here, but your tippet from the sighter is onlt going to be about 3 feet, and a single fly is the only way I’d fish it. Whychus Access up FS Road 16 towards Three Creek Lake is where you want to go. The water is bit murky from the sunny days on the glaciers but unless big thunderstorms come through, it is fine