Grand Canyon Trust

The Grand Canyon Trust was founded in 1985 to safeguard the wonders of the Grand Canyon and the Colorado Plateau, while supporting the rights of its Native peoples. We envision a Grand Canyon and Colorado Plateau where wildness, the diversity of native plants and animals, clean air, and flowing rivers abound; sovereign tribal nations thrive; a livable climate endures; and people passionately work to protect the region they love for future generations.

http://www.grandcanyontrust.org