I fished Blue Lake a few years back during the first week of October. During the early evening I saw the largest mayfly hatch I have ever seen.
If that isn't happening, or any other hatch going on, try a water boatman. They are in the water year around and usually go no deeper that 15 feet. The water is cooling down now and you will probably find fish cruising the shoreline looking for them. This last weekend I was out at Amber and was using a boatman in 3' of water and several hit it the moment it landed on the surface, Wham! eek
Good luck and let us know how you did. smile