I'm not sure about the shallowest portion of the main pool, but my son, at 46", was able to stand in the shallowest point.
I CAN tell you, however, that the deepest point was just 5' deep. I walked (bobbed) through the whole pool while holding my toddler daughter. I am 5'4", and when we got to the 5' part, I had to stand on my tiptoes and hold her up out of the water.