Little Lava lake was also really good this week, but for my 3 days on the water far better when the dry fly fishing was happening than on nymphs under an indicator or bung. When the callibaetis were hatching it was lights out on dries. A sparkle dun and tilt wing were the best 2, but we also got some fish on an olive haze and I chose it because the wing it so visible in the wind chop and glare. 
The fish we did catch on nymphs were on an olive chironomid with a red butt, a CB Cate and a red 2 bit hooker. 
Beetles at time were magic, and on one of the hot days earlier in the week the fish were pounding adult damsels and we had some heart stopping takes on a blue chubby none to the net with a damsel yet. 
I recommend a #12-14 blue chubby and run a dropper of 5x tippet 24″-30″ with an adult damsel or unweighted damsel nymph as a dropper. Jim Copes damsel nymph is the fly of choice for me here.