FACToid

 • Grand Canyon established as a forest preserve in 1892

 • Became a national monument in 1908

 • Total acreage: 1,215,375

 • Designated a national park in 1919

 • Length in air miles: 190

 • Length in river miles: 277

 • Minimum width: 600 feet at Marble Canyon

 • Maximum width: 18 miles

 • Minimum width of Colorado River: 76 feet

 • Average width of Colorado River: 300 feet

 • Maximum depth of river: 85 feet

 • Average depth of river: 40 feet

 • Number of rapids: 160 River

 • Number of known archaeological sites within the park: 2,700

 • Number of Indian reservations in the park: 1 (Havasupai)

 • Total miles of trails in the park: 400

 • Total number of those trail miles that are maintained: 30.7

 • Number of miles of roads: 355

 • Number of bird species in park: 287

 • Number of mammal species: 88

 • Number of reptile and amphibians species: 58

 • Number of plant species: 1,500

 • Number of fish species: 26

 • Number of biotic life zones in the park: 5 (the same as traveling from Mexico to Canada)

 • Endangered wildlife species: 3 (bald eagle, peregrine falcon, humpback chub)

 • Number of buildings listed as  National Landmarks: 120

 • Number of structures on National Register of Historic Places: 136