Spent the last few evenings in these creeks fishing the last hour or so to dark.  Has been excellent using a parachute Adams size # 16.  Fished the other evening and never changed flies, landed well over a dozen nice fat, robust browns.
Fished the same stretch on Fish Creek 2 nights ago bringing 6 plus browns to the net I about 20 minutes, 2 over 18" using a size # 10 Iso comparadun.  
This has got to be the best time of the year to catch big browns.  They are aggressive and blow-up on the fly.  Saw a few Hex flying up stream the other night so the fishing is going to get better! 
Tight lines