This is some species of March Fly, a soft-bodied dipertan (more closely related to mosquitoes, midges & gnats then, say, house flies). On my recent trip to the Adirondacks, they were all over the summit of Whiteface mountain the morning we visited (not really sure the significance of this).
What is particularly interesting about this genus of insects is that you can sex individuals by the size of their eyes. Males are visibly holoptic (meaning their the big compound eyes meet along the dorsal line) and females, well, not so much.
This is a dude.