A stonefly hatch is about the most exciting event a fly fisherman will ever encounter. These insects can be quite large, with the famous Salmon Fly being the biggest. The nymphs live in the water for 2-4 years prior to hatching and crawl out to the shoreline to emerge. Anglers can use dry flies near overhanging trees and near the shore to imitate the females returning to the water to lay eggs. Don't be afraid to skitter and move your fly as well!
The most common stonefly hatches are Golden Stoneflies, Salmon Flies, Skwala Stoneflies, Summer Stoneflies, and Yellow Sallies. We have all of these on our home river called the Yakima. Our patterns are the best dry flies available.