Bodybuilding, Weight Lifting

The squat does work the entire lower body as you mentioned above. The hamstring is activated somewhat when you are on your downward movement and the area that is activated is more the upper attachment of the hams. So if you want to get stronger hams by doing the squat it realy is not going to happen. The calves while doing the squat is more of a supporting muscle unless at the end of yoyur upward movemnt you do a calf raiser. The major muscles the squat work are the thigh muscles and the gluteus muscles. Again if you want to gain strength in the calves you have to isolate them with various types of calf raiser excercises. "Cool Runnings"

PReneau

Squats do involve all of your lower body but the calves. The main muscle involved is the quads and then hamstring to a certain extent. agree with the above comment that deadlifts are a good exercise hamstrings and gluts. For calves you need to do more specific exercises such as calf raises.