The Metolius River is seeing good fishing in the upper, middle and lower sections of the river. 
In the Upper river from the headwaters down to gorge campground the fish are looking up at golden stone patterns like a Clarks and Norm Woods, and also yellow sally’s, PMD’s and caddis. Nymphs and dries will serve you well here, and matching the hatches listed but also adding zebra midges, walt’s worms, frenchie’s, and assorted perdigons will be great to use throughout the day. 
On the middle river you’ll see an afternoon green drake hatch coming on sometime after 3 and lasting until about 5 or so. You won’t have 2 solid hours of the big green bugs hatching, but within that 2 hour window of your day you should see a good hatch that gets the fish excited. PMD and BWO and Caddis can hatch almost any time from noon to about 8, and in the evening you can expect more caddis hatches and finish the evening with a rusty spinner in a #16. Caddis for me is usually matched with an iris caddis, but the Silvey’s edible emerger, corn fed and Keller’s caddis are worth adding to your fly box too. Another good fly to add is a henryville. Not only does it imitate a caddis, but it’s one of our favorites to match a little olive stonefly which have been abundant already. 
In the lower river from Bridge 99 down the hatches are a surprising mix of what we see in the upper and middle river areas. It’s so weird the pockets of water temperature changes and what that does to insect life. So look for some stoneflies to mix in, but really focus on drakes, PMD’s and caddis. 
FFP guide Troy has been guiding on the House on Metolius and mentioned that there is a lot more bull trout around, which makes me believe some of the lake run fish are already moving up. If this is true, they will be spread out from the canyon down to bridge 99 and good fishing for bulls this summer is looking good. Bring your 8 weight and a sink tip and some big, articulated streamers and go.