The Metolius River is seeing an uptick in hatch action. Chester and I fished together last night after I closed the shop. We arrived to a mix of PMD and BWO hatches with very few caddis hatching. At dusk the Rusty Spinner fall got going for about 15 minutes, and the bats and the trout got happy just before dark. 
My friend Jesse was there after his work earlier this week, and texted me when I was home watching the Olympics and said he ran into a great PMD hatch at 5:30 but ended up catching 2 on a Griffiths Gnat, and 4 more on Soft Hackles and Caddis Pupa. All of this is Middle River stuff, and I know the Upper River is seeing equally good, or better fishing on Golden Stones, Tan and Olive Caddis, PMD’s, Mahogany Duns (Quill Gordon and Purple Comparaduns and a fly called an Upright Rusty Spinner are favorites) 
Nymphing is good all over the river, especially the Euro Jigs and Perdigons, but Green Drake nymphs, Golden Stone nymphs, Caddis Pupa and PT Soft hackles would be patterns to add to the box on any given day. 
No big showings of Yellow Micro Caddis or Little Olive Stones yet. Yet. 
Bull Trout fishing is good and they are chasing big streamers quite well. Early morning sessions are the best bet. If we end up getting some cloudy weather this week, it could be good all day.