Also, stonefly nymphs are found on the stream bottom rocks in various stages of development and nymph patterns are typically fished successfully year-round on waters that have open regulations.

Photos by Steven Nehl/The OregonianThis salmon fly has just emerged from its nymphal case Friday along the shore of the Deschutes River at Trout Creek. Fly fishermen looking into the grass and ...

Sports Outdoors Yakima River stonefly action ready to peak, fly fishing guides say Wed., July 3, 2013 Summer stonefly in the Yakima River. (Red's Fly Shop) ...