Insects and other foods the trout may be eating:
1.   Blue-winged Olives - mostly Little BWO - Isolated hatches
2.   Giant Black Stoneflies - starting any day, nymphs active
3.   Hendricksons - may have ended
4.   Cinnamon Caddis - Mostly Abrams Creek
5    Light Cahills - hatching
6.   Midges - hatching in isolated locations
7.   Little Short-horned Sedges - should hatch randomly for 2-3 months
8.   American March Browns - hatching but randomly in isolated locations
9.   Streamers - matching sculpin, baitfish and small crawfish
10. Little Yellow Stoneflies - hatching
11. Eastern Green Drakes - should be starting in Abrams Creek
12. Green Sedges - hatching

Light Cahill - Spinner

The spinners normally deposit their eggs and fall spent on the water very late in
the day or early evenings. This happens in the same water that they hatch from.
You may notice them dipping to the water very late in the afternoons just before
dark. If you do, I suggest you try fishing an imitation of the Light Cahill spinner. In
many cases the spinner fall may not occur during the time you can legally fish in the
park. On very hot days, the spinner fall may not occur until early in the morning.

Present the spinner imitation in the same water you would fish the dun imitation -
slower water immediately adjacent to the fast water. Use the same short upstream
or up and across presentation you use for the dun. You should place your fly at the
ends of the current seams downstream of the fast water, not in the fast water. The
fly should be in the same area of the bubbles that are almost always present near
the end of these seams. This may require a downstream or a down and across
presentation in some places.  
This is our "Perfect Fly" Light Cahill Spinner.

Copyright 2009 James Marsh