277 miles (446 km) long, up to 18 miles (29 km) wide and attains a depth of over a mile (6,093 feet or 1,857 meters)
With these impressive numbers, I do not have to explain how amazing this Nation Park is. It overwhelms your senses through its immense size. Standing on the rim, makes you double check that you are not looking at a painting. Descending into the canyon makes every sense flicker.
So put on those hiking boots, and hit the Canyon.