The full hike on the Bright Angel Trail from the rim to the canyon bottom is 4.9 miles, but given that it was late June and well over 90 degrees, getting just two miles into the canyon was a remarkable feat. And hiking down was the easy part . . . hiking back up and out, well, that was a little harder.
But with that said, the canyon takes on a completely different perspective, and has a completely different beauty, from the inside looking up and out than it does from the top down.