We hiked the south rim of the Grand Canyon in one day! It was crazy. But also very rewarding. We hiked down South Kiabab and up Bright Angel. it was 16 miles in all. The first 12 werer easy, but the last 4 were killer! We started at 7 am and ended at 4:30 pm. It was a beautiful view and definitely worth the work. I highly recommend it!