Northern Green Frog

Yea, frogs are always tough. It's amazing how variable one species can be!

That appears to be right--I was looking at the vague stripes on the hind legs (at first thinking northern leopard frog).

The green frog and bullfrog look almost identical. However, the green frog has dorsolateral ridges (the two ridges that run down either side of the back) and bullfrogs lack these ridges. It's the easiest way to distinguish the two.

Possibly bullfrog?