Re: where should i go to fly fish in august?
First off welcome to the forum!
Your a long ways away, but the Rockies have had a tremendous winter snow pack, we are in full spring runoff right now and once it subsides the fishing is going to be awesome in July and August! I'd suggest anywhere in CO, WY, MT or ID.
If your looking for something a little closer, you might think about the Driftless area of WI.