More proven spring fly patterns:
McKees Rubber Legs Tungsten brown and yellow
We have been fishing this fly on the Middle Fork of the Willamette, Mckenzie and Deschutes for a few years now. It is an easy one to tie and imitates a golden stonefly nymph nicely. The tungsten bead helps it get down in the fastest flows. This is a great “tool” fly to tie on a smaller dropper off the hook bend. However many a spring day this one has been the preferred imitation.