Off the top of my head copper john, wolly bugger, daves hopper, adams dry fly, parachut adams, hairs ear nyph, mickey fin in chatruues are all good flies.

Daves grass hoppers work great with trout. Go to your local library and check out a book about flyfishing. It helps alot.

i agree with the rest of the guys a wooly bugger, black or olive is hard to beat anytime of the year

The best fly to use depends on what time of the year you are fishing. In the June-July months I like to use Brown Drakes. It also depends on the area you live. You can ask local fhisherman and they would be glad to help. Another tip is that while looking at the water, you notice many fish jumping,right? Well, the bigger fish suck the water down down jump. Good luck fishing.

this question may be a little to broad, all fishermen have different favorites, but to answer the question though, my 2 picks are the golden hornberg and the micky finn