Originally Posted by wmfleet2
is there a time when the black flys are not out ,,July,,,,August, making plans now to go
They are present then. I don't know that you're going to get away from them unless you go very early in the season or very late. You'll be fine for stopping a few minutes here and there. They are seemingly attracted to heat, so just walk away from your bike and you'll be OK as long as you keep on moving. They disappear past dusk.
I wouldn't worry too much as long as you aren't planning on spending multiple days not riding and just hanging out outside.