One of the world s most spectacular places, the Grand Canyon annually attracts over 4 million visitors who peer over the edge of the abyss. A smaller number of them trek from the rim to the banks of the Colorado River on one of the nation's best-known hikes. Many of these hikers are inadequately prepared for the rigors of what can be a deadly journey. This indispensable guide describes the most popular route into the canyon the 16.2 mile round-trip route from the South Rim to the Colorado