Arches National Park Quick Facts

Landscape Arch, North America's longest.

NPS/Neal Herbert

• Park Designations:
  Arches National Monument—established April 12, 1929
  Arches National Park—established November 12, 1971
• Acreage: 76,519 acres or 119 square miles
• Visitation: 1,539,028 (2017) View more visitation statistics.
• Highest Elevation: Elephant Butte 5,653 feet
• Lowest Elevation: Visitor Center 4,085 feet
• Average annual precipitation: 8-10 inches Read more about weather.
• Number of documented arches: Over 2,000 (Some may have fallen and new arches may be forming.)
• Longest arch: Landscape Arch has a light opening 306 feet (93.3 meters) across.
• Tallest arch: Double Arch South has a vertical light opening of 112 feet (34.1 meters).
• Rock colors: Red sandstones in the park contain iron oxide. Greenish rocks also contain iron, but in a reduced (non-oxidized) state. Depending on the conditions under which a rock was formed, iron can color rocks red, black, orange, purple, or greenish grey.
• 483 species of plants
  Rare species: Canyonlands Biscuitroot
• 186 species of birds
  Threatened species: Bald Eagle, Mexican Spotted Owl
• 52 species of mammals
• 6 species of fish
  Endangered species: Bonytail Chub, Colorado Pikeminnow, Humpback Chub, Razorback Sucker
• 6 species of amphibians
• 21 species of reptiles