Facts of Yellowstone National Park

• 2,221,766 acres
• 3,472 square miles
• 54 miles east to west
• 63 miles north to south
• 96 % in Wyoming
• 1 % in Idaho
• 3 % in Montana
• Highest Point: 11,358 ft (Eagle Peak)
• Lowest Point: 5,282 ft (Reese Creek)
• Larger than Rhode Island and Delaware combined
• Approximately 5% of park is covered by water; 80% is forest and 15% is grassland
• Precipitation ranges from 10 inches at the north boundary to 80 inches in the southwest corner
• Temperatures range from 9° F in January to 80° F in July at Mammoth Hot Springs
• Record High Temp: 98° F
• Record Low Temp: -66° F

WILDLIFE

• 2 species of bears
• 7 species of native ungulates
• Approximately 50 species of other mammals
• 18 species of fish
• 311 recorded species of birds (148 nesting species)
• 4 species of amphibians
• 6 species of reptiles
• 5 species protected as "threatened or endangered"
• Threatened: bald eagle, grizzly, lynx
• Endangered: whooping crane, gray wolf

FLORA

• 8 species of conifers
• More than 1,700 species of native vascular plants
• More than 170 species of exotic (non-native) plants
• Approximately 80% of forest is comprised of lodgepole pine
• 186 species of lichens

GEOLOGY

• An Active Volcano
• Approximately 10,000 thermal features
• More than 300 geysers
• Approximately 2,000 earthquakes annually
• One of the world's largest petrified forests
• One of the world’s largest calderas, measuring 45 by 30 miles
• Approximately 290 waterfalls, 15 ft. or higher, flowing year-round
• Tallest waterfall: Lower Falls of the Yellowstone River at 308 ft.

YELLOWSTONE LAKE

• 110 miles of shoreline
• 136 sq. miles of surface area
• 14 miles east to west
• 20 miles north to south
• Maximum depth: about 400 feet
• Average depth: 140 feet

CULTURAL RESOURCES

• 1,106 historic structures
• 1,000+ documented archeological sites
• Nearly 200,000 museum objects
• 20,000 titles in Park Research Library
• 6 National Historic Landmarks (Obsidian Cliff & 5 buildings)
• 2,500 linear feet of historic documents
• 21 Affiliated American Indian tribes
• About 90,000 photographic prints and negatives

ROADS AND TRAILS

• 5 park entrances
• 466 mi of roads (310 mi paved miles)
• 97 trailheads
• 287 backcountry campsites

VISITATION

• Record year: 1992 – 3,144,405 visitors
• Winter visitors: Approximately 140,000

FACILITIES

• 9 visitor centers and museums
• 7 NPS-operated campgrounds (454 sites)
• 9 hotels/lodges (2,238 hotel rooms/cabins)
• 2,000+ buildings (NPS and concessions)
• 5 concession-operated campgrounds (1,747 sites)
• 49 picnic areas
• 1 marina