Depending on the weather and temperature this fly starts hatching sometime around 2 in the afternoon. On this particular day the hatch was drawn out and sporadic all afternoon which is actually the way I prefer it. Instead of fast and frantic it was a nice leisurely afternoon strolling the stream picking off any risers.
Most of the "better sized" trout caught were 10"-14" browns but you could hook all the little brookies you wanted in the riffles.
This was my best trout of the afternoon, a 17" brownie that smacked my #14 Hendrickson dry and gave a very good account of herself on my 4 weight.
If you know a little about this mayfly in particular you will know after the afternoon hatch the fishing slows down and then some of the best fishing often happens later when the flies come back mate, lay their eggs and die. It is called the spinner fall. It can be a little iffy hitting it right, sometimes its too warm or too cold, sometimes its too windy. By 6 the hatch was done and the fishing slowed. It looked if the spinner fall was going to happen it would be later that evening. It had been a great afternoon and why push it? Besides there was cold beer back at the truck.