The famous nocturnal Hex hatch of the Midwest (and a few other lucky locations) stirs to the surface mythically large brown trout that only touch streamers for the rest of the year.
This one pretty clearly keys to Kogotus, but it also looks fairly different from specimens I caught in the same creek about a month later in the year. With only one species of the genus known in Washington, I'm not sure about the answer to this ID.
Wbranch on Jul 21, 2015July 21st, 2015, 3:47 pm EDT
You want a line that is matched to the "line weight" of the rod you will be using. Most modern fly rods have the length of the rod and the preferred line weight inscribed on the butt section of the rod near the cork. It will say something like 9' #5 or 8 1/2' #6. You want to buy a weight forward line as it will be the easiest to learn to cast. Do not buy a level line. A weight forward line means just that; most of the heavy line to effect the cast is going to be in the first 30', there will also be a nice tapered section in the very front to slim down the line and create a smooth transition from the fly line to the butt of your tapered leader.