Very good fly fishing on the Truckee River. Flows are high, temps are cool, and fish are active. 

This is how it should be in June. Not that hot, bigger flows, and happy fish. We'll get our heat, and the flows will drop, and you'll need to stop fishing when the water temps get warm, but right now, ain't none of that.

Nymphng will get them always, but remember, there's more than one way to skin a cat. This can be a good time to blind fish big dries, (put a nymph or 2 below it.) Streamer fishing can be good as well. Swinging flies on a 2 hander, soft hackles, etc. 

Green Drakes have been out. Not so many fish on them during the day, but before dark you may see some big hatches in the next few days. 

Nymph with drakes, pmd, and caddis. Crayfish are never off the menu.