Last year I caught them the first day I tried which I believe was sometime in June . Full moons were great last year. Can't tell you when they really start on the river cause in May I'm chasing turkeys, Crappies, stream trout Lake Ontario Browns and fishing Chaumont, Black River Bay, Lisbon or Quinte for walleyes. I'll let you know when I get my first River eye. Headed to do some stream fly fishing tomorrow and Wednesday.