Figure 2. The rear foot of a raccoon shows the “heel” and looks like a small human footprint. Both front and back feet have five toes. The front prints have shorter heel marks and are 2 to 3 inches long; the hind tracks are 3 to 4 inches long.
(From Pandell and Stall, Animal Tracks of the Pacific Northwest.)

I had no idea raccoons could climb up onto the roof so easily! WOW