Been to a valley lake the last few days and there have been fish very active on the surface. The problem is I cannot get anything to rise on some dry flies I have been tossing. Any ideas what works well right now in local lakes? Ive only been fly fishing for about a year and just started lake fly fishing this year. Any ideas and tips would be nice. Another thing, in the lake Im fishing there are rainbows and grayling. Thanks for any tips and hook suggestions.