Grand Canyon Hiking can be one of the most challenging and memorable experiences of a lifetime. But no hike in the canyon is easy: the terrain is steep, dry and rugged. This channel is designed to help you plan for and enjoy your hike into the canyon's harsh, yet fragile, environment. The Grand Canyon overwhelms our senses through its immense size. Unique combinations of geologic color and erosional forms decorate a canyon that is 277 river miles (446km) long, up to 18 miles (29km) wide, and a mile (1.6km) deep.