There is none better than the Metolius (in our opinion) This is such a good time to be on the river, or even near it. Wildflowers are blooming, hatches are thriving, birds are singing and the trout are hungry. 
Green Drake hatches continue to roll, and the time period for finding them is more spread out as we enter the final 10 to 14 days of the June hatch. At this point of the hatch we can see the drake emergence begin at 2 PM, and be as late as 6 PM. If you are an early riser you might even see Green Drake Spinners near dawn. It is rare to see Green Drake Spinners BTW, in my 40 years of enjoying the Metolius I have really only encountered a terrific spinner fall of drakes once! 
Smaller spinners are very common to find at dusk, especially the Rusty Spinners associated with the PMD hatch. Usually a #16 Harrops Biot Body Para Spinner is #1, and my Sunset Spinner is another good profile to show them. We also have a fly called a Winna-Spinna that is for the faint of sight (you know who you are).
PMD hatches are happening twice a day in most areas, with an afternoon hatch and an after dinner hatch occurring. Fish the entire cycle of the hatch, with nymphs, emergers, duns and spinners and during the emergence a fair number of cripples that you can fool some fish with Knock Down Duns and Quigley’s Half Down Duns are 2 of my fave’s. 
There are also some #20-22 BWO’s in the evening hatch, so look for them around the hatchery area after dinner and before dusk. 
We are in a great Caddis period, including some amazing evening dry fly opportunities. Iris Caddis is a great fly that looks like a floating pupa in the process of emergence, X Caddis is the next few seconds that happen as the adults is crawling out of the pupa shuck but not ready to fly away quite yet. These 2 profiles will be important to show the fish. On any river. For adults we like a bunch of flies, everything from a Corn Fed Caddis to Henryville and even an Elk Hair Caddis will produce in the faster stretches of riffles in the canyon and below Lower Bridge 99. I vividly remember one of my (former) employees who fished the faster riffles below 99 and skittered Elk Hair Caddis in the riffles with tremendous success. Try it. 
Golden Stones are showing more and more in the upper river. I have not heard of many people getting fish on Clarks Stones or Norm Woods Specials yet, but those 2 flies are a must to have in the collection for the river for the next 3 1/2 months. Golden Stone Nymphs are also essential, and are useful in any mile of river from below the headwaters to the reservoir. Wide spread and prolific and loved by trout. 
Euro Nymphs, including a myriad of colors of beads and bodies on your Perdigons. Caddis Pupa, Frenchies, Walts Worms and 2 Bit Hookers are wonderful choices throughout any summer day. Add some Soft hackle PT’s, Zebra Midges and Micro Mayflies. 
We’ve had some decent to pretty good mornings catching Bull Trout on big streamers! And it will only get better from here as the lake run fish are just a few weeks away.