This all-new 3rd Edition of the book that first came out in 1986, has been expanded from 160 to 224 pages, and there are about 90 more fotographs than in the 2nd Edition. This edition still has all the hikes from previous printings, but each has been re-visited and updated. The author re-walked most of the canyons. The biggest changes for this 3rd Edition is the addition of 8 technical slot canyons where you'll need ropes and rappelling gear to get all the way through. These canyons are either bolted, or have slings around chokestones for easy rappelling (usless the anchors have been washed away!). This means a new level of challenge and excitment for the adventurous hiker. Also included is an expansion to the colorful history of the San Rafael Swell (Old Spanish Trail, the Livestock Industry and Mining), plus expanded geology and information about the Cleveland-Lloyd Dinosaur Quarry.