Day 3 of the hike went from Phantom Ranch to Indian Gardens, covering 5 miles and gaining 1200 feet in elevation. The hike passed through areas like Angel Falls, Devil's Corkscrew, and Anasazi Ruins. Day 4 went from Indian Gardens to the South Rim, also 5 miles long and gaining 2900 feet in elevation. Points of interest on Day 4 included Kolb Studio and views from the South Rim. The document concludes with tips for planning a rim-to-rim hike like going in spring or fall, considering a tour, having good boots, getting in shape, and being safe.