Park Facts

History

  • Yellowstone National Park was established on March 1, 1872.
  • Yellowstone is the world’s first national park.

Geography

No area figures have been scientifically verified. Efforts to confirm the park’s total area continue.

  • 3,472 square miles (8,991 km2)
  • 2,221,766 acres or 899,116 hectares.
  • 63 air miles north to south (102 km)
  • 54 air miles east to west (87 km)
  • 96% in Wyoming, 3% in Montana, 1% in Idaho
  • Highest Point: 11,358 feet (3,462 m; Eagle Peak)
  • Lowest Point: 5,282 feet (1,610 m; Reese Creek)
  • Larger than Rhode Island and Delaware combined
  • About 5% covered by water; 15% by grassland; and 80% by forests

Precipitation

  • Annual precipitation ranges from 10 inches (26 cm) at the north boundary to 80 inches (205 cm) in the southwest corner. Learn more about weather in Yellowstone.

Temperature

  • Record High: 99ºF (37ºC), 2002 (Mammoth Hot Springs)
  • Record Low: -66ºF (-54ºC), 1933 (West Entrance, Riverside Station).
  • Average daily at Mammoth Hot Springs: January: 9ºF (-13ºC); July: 80ºF (27ºC)
  • Learn more about weather in Yellowstone.

Yellowstone Lake

  • Elevation: 7,733 feet above sea level
  • 131.7 square miles of surface area (341.1 km2)
  • 141 miles of shoreline (227 km)
  • 20 miles north to south (32 km)
  • 14 miles east to west (22 km)
  • Average depth: 138 feet (42 m)
  • Maximum depth: 430 feet (131 m)
  • Learn more about Yellowstone Lake

Geology

  • The park sits on top of an active volcano.
  • One of the world’s largest calderas at 45 x 30 miles (72 x 48 km)
  • 1,000­ to 3,000 earthquakes annually
  • More than 10,000 hydrothermal features
  • More than 500 active geysers (more than half the world's geysers)
  • About 290 waterfalls
  • Tallest waterfall near a road: Lower Falls of the Yellowstone River at 308 feet (94 m)

Wildlife

Vegetation

Cultural Resources

  • 26 associated Native American tribes
  • More than 1,800 known archeological sites
  • More than 300 ethnographic resources (animals, plants, sites)
  • 25 sites, landmarks, and districts on the National Register of Historic Places
  • One National Historic Trail (Nez Perce)
  • More than 900 historic buildings
  • More than 720,000 museum items, including 30 historic vehicles
  • Millions of archived documents
  • More than 20,000 books (many rare), manuscripts, periodicals

Employees

National Park Service (July 2015)

  • Permanent: 330 total
  • Full time, year-round: 176
  • Subject to Furlough: 146
  • Part time: 8
  • Term (variable duration): 37
  • Seasonal: 406

Concessioners

During the summer, about 3,200 people work for concessioners in Yellowstone.

Facilities

Roads & Trails

Budget

Fiscal Year 2015 (in millions)
  • Total: $69.1
Federal Funding
  • Congressional Annual Appropriations: Operations and staff (base): $34.6
  • Wildland Fire: $1.2
  • Other Appropriations: $17.5
Other Funding
  • Donations and Grants: $3.0
  • Fees: $7.5
  • Utilities & Agreements (Reimbursable): $5.3

Distribution of Budget

  • Administration: 8% Includes human resources, contracting, budget and finance, property management, telecommunications and information technology
  • Facility Operations and Maintenance: 42% Includes utilities, roads, trails, structures, historic preservation coordination, construction management
  • Resource Protection: 15% Includes research and monitoring of natural and cultural resources, invasive species management
  • Visitor Services: 35% Includes interpretation and education, law enforcement, emergency medical services, search and rescue, entrance station operations, structural fire activities, and park concessions management

Visitation

  • Yellowstone hosts around four million visits each year. More than half of these visits happen during June, July, and August.
  • The last time the park recorded fewer than 3 million annual recreational visits was in 2006, with 2.87 million visits.
  • Detailed park statistics are available at https://irma.nps.gov/Stats/
 

Last updated: August 21, 2017

Contact the Park

Mailing Address:

P.O. Box 168
Yellowstone National Park, WY 82190-0168

Phone:

(307) 344-7381

Contact Us