The first photo is a fish landed on the first cast.  Really just a set up cast that I let drift out and Bam!  A few casts later was a smaller fish about 17".  The BWOs were popping.  S and M nymphs.  Before the S and M this time of year the best fly was a size 20 micro may.  The micro may takes a lot longer to tie, so I just use an olive S and M.