Learn about Grand Canyon National Park with a Park Ranger as your guide. Inside Grand Canyon provides an indepth look at the nature science history and culture of the Grand Canyon told through audio video podcasts and Ranger Minutes. A powerful and inspiring landscape 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.