In the fall of 2019 I hiked from the Rim to Rim of the Grand Canyon and back. A hike along the south Rim of the canyon in the middle of the two legs brought the total to 55 miles hiked in 48 hours. The Grand Canyon is one of the most awe inspiring places in the country. The hike itself is one of the most crowded hikes in the National Park system so you will have lots of opportunities to socialize. If that’s not your thing, I’d suggest taking some of the side trails or other trails in the park.