Giant Hairy Scorpion

This little guy was right in the middle of North Kaibab trail (Grand Canyon,) below Cottonwood campground. I looked it up on the Grand Canyon website and they say it is a Giant Hairy Scorpion. To me it appears small and not hairy, but what do I know? I looked at it and took pictures from very close but it did not move a bit. Dose it even have a head and a mouth?