For what it's worth, I agree with Kurt, though it's a little hard to tell it's a wood frog in the 3rd photo. The frog on the left looks to have the dark mask around the eyes a wood frog has and seems to be missing the padded digits even a young peeper has.

I'm wishing I had my camera on me when I found some teeny wood frogs yesterday, but here's a young peeper that still had a curled nub of a tail left to absorb for comparison:

FrogForum - UncleChester's Album: Wild Frogs (and Toads (and other Amhibians (plus some turtles))) - Picture