The McKenzie River is a gem now, with cold clear water and good fishing for our guide team. They are reporting very catches on various nymphs, especially perdigons and small Jig Streamers fished side-drift Euro Style, or under an indicator, or swinging. 
Dry Dropper rigging with a Chubby has also been effective and the fish sometimes show a preference for the Chubby over the nymph which is a blast. 
Look for some rising fish to be up on Elk Hair Caddis, Stimultators, Parachute Adams and H&L Variant’s.