Petersons guide, juvenile Sharp Shinned hawk, or juvenile Coopers hawk, or juvenile Northern Goshawk, or juvenile Red Shouldered hawk, or juvenile Broad Winged hawk. I think they used the same picture for all of them. I guess Petersons guide is history.
Since this young bird is lacking the white band above the eyes, and has multiple barring along the tail I would guess she is a Cooper's Hawk. Excellent photo by the way.