The Grand Canyon is a "gorge" or "canyon" if you wish. Hence the name Grand Canyon. However, there are two "plateau's" on either side of the canyon which could be considered part of the GC, from a certain point of view.
i don't know if this is the answer your looking for but John Powell explored the grand canyon at one point.
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The highest point of the Grand Canyon is found at the North Rim, with an elevation of around 8,803 feet (2,683 meters) above sea level. The lowest point in the Grand Canyon is where the Colorado River flows, with an elevation of approximately 2,400 feet (732 meters) above sea level.
At its deepest point it is over a mile.
right by the mather point
Point Imperial - At 8803' it overlooks the painted desert of the east end of the Grand Canyon. Point Imperial, the highest point of the Grand Canyon, is 6600' above the Colorado River. There are great views of Mt. Hayden from this view point. Marble Canyon can be seen as well as Saddle Mountain. Location: N. terminus of the Point Imperial road
Yes, the Canyon floor is about 2,600 feet above sea level.
I dont believe any tribe inhabits the Grand Canyon itself at this point but there is a reserve just south of the grand canyon that is home to the Hualapai Indian Tribe. but there may be a few others that inhabit the area.
Clarendon, Texas
At its deepest point, it is 19,714 feet.
The answer depends largely on where you are along the Canyon...Grand Canyon Village is on the South Rim of the Grand Canyon at an elevation just short of 7,000 feet. The river is about 2,000 feet above sea level, so the depth of the Canyon from Grand Canyon Village is around 5,000 feet. North Rim, near where Grand Canyon Lodge is, is about 1,000 feet higher than South Rim, making North rim to the bottom of the canyon 6,000 feet down.