The document describes a group of hikers completing a rim-to-rim hike across the Grand Canyon over two days. The Grand Canyon is 280 miles long, 4-16 miles wide, and 3500-6000 feet deep. On the first day, the group hiked 7 miles from the North Rim trailhead at 8200 feet in elevation down to Cottonwood Camp at 4200 feet. The second day consisted of another 7 mile hike from Cottonwood Camp to Phantom Ranch at the bottom of the canyon at 2700 feet, passing Ribbon Falls and traversing a narrow gorge called The Box. Potential wildlife encounters on the hike include ringtail cats, mice, skunks, coyotes, and scorpions.