I fish the Salmon River in New York and I can't seem to go wrong with STONEFLY patterns...........I have created a few versions that work well
( not reinventing the wheel, but a variation of a theme ), but bigger is sometimes better..........but then again, sometimes a size 8 black/chart stonefly will be what they want........we all know they don't eat when they enter the river.........digestive system shrivels up.......but they will smack a fly out of aggression and instinct..............I have watched salmon move 2 feet either way to pick up my stonefly, turn their head and spit it out.........simple estaz flies in a variety of colors work...........glo-bugs.....almost any steroid sized egg pattern will get a king or coho to swipe.......big buggers work too.......dress them up well!!!

if one color is not working, try another..........

Hope some of this helps..........

2bonthewater