f hiking the Bright Angel Trail, or any other trail that leads down into the Grand Canyon is the stuff of your dreams, be warned--it isn't the easiest thing to do. Sure, going down is fine. That path of switchbacks, often with mule pee at every turn, beckons downward. "This is swell, " you might say to yourself. "Isn't the Grand Canyon grand?"
http://www.gadling.com/2009/06/28/grand-canyon-hiking-tips-on-how-not-to-have-a-heart-attack/