Enhance RX Subsequently, your best option for winter hiking is the South Kaibab Trail, you will seemingly have warm sun all through the day. There are some fun tour packages obtainable at the South Rim. The general scientific consensus, up to date at a 2010 conference, holds that the Colorado River carved the Enhance RX starting 5 million to six million years in the past. Come to Northern Arizona for 3 days of blissful workshops…See More