I fully agree with Fishidiot. With my self being within a half hour of the Breeches, Letort, and Big Spring, I have plenty of time to learn from these creeks. These fish in Big Spring do mainly feed on scuds and cress bugs and rarely come to the surface. Even though some days where there is a good hatch going they might come to the surface, I almost always stick with scuds, cress bugs, and an occasional midge. Hint: try using a blood midge, always works for me. I also recommend Mike's book Spring Creek Strategies. Fishing the Cumberland Valley spring creeks is not the easiest place to fish without practice. Once you fish it a few times and get to know how the fish act in the stream, then you will catch more fish. I started fly fishing Big Spring and the Letort when I was a kid, trust me, it is not that easy so don't get discouraged. If I'm on Big Spring and I catch 2 fish all day, that is a good day. The same with the Letort. The biggest thing to remember for these creeks is that the water is gin clear giving the fish an advantage, there are loads of cress where they can run to cover or spend all day rooting around in to get scuds and cress bugs, and finally it once again is all about presentation. I hope these tips help you out fishing Big Spring. Good luck and welcome to spring creeks. Breeches