This Skwala nymph still has a couple months left to go before hatching, but it's still a good representative of its species, which was extremely abundant in my sample for a stonefly of this size. It's obvious why the Yakima is known for its Skwala hatch.
Grasshoppers and crickets are terrestrial insects--the only part of their life cycle spent in the water is the "oops" stage. Grasshoppers are most important to the trout, but crickets may fall into streams as well.