Next we have one of the most sought after hatches of the year. The Utah Green Drake. It’s a huge greenish mayfly that hatches on the Middle Provo in early July and lasts for a couple weeks. They hatch at around 11:30 am and can last for a couple hours. This hatch is famous for producing big trout on dry flies. Use Hair Wing Drakes, Stimulators or Deer Hair Drakes. Nymphing will produce trout all day. I like using Split Case patterns in brown, black and olive.