Yellowstone National Park

Nature in Wyoming, Wyoming, United States

• Best months: April–October
• Elevation gain: 0 m
• Open weeks per year: 30

Things to do

• wildlife viewing (notable species: wolves, bears, bison)
• winter guided tours (modes: snow coaches, snowmobiles)

Amenities

• live webcams
• multiple lodging options — reserve early
• nps mobile app — park navigation and information
• paved road access (reaches: geothermal areas, lakes, waterfalls)

Best time to visit

• summer for warm access (temps: 70s–80s °F daytime · window: June–August)
• winter for snow tours (temps: 0–20 °F daytime · window: December–February)

Features

• 10,000+ hydrothermal features (geysers: 300+ · share of world geysers: ~two-thirds)
• 3,468 sq mi total area (states: Wyoming, Montana, Idaho)
• 330 bird species documented (nesting species: ~148)
• 67 mammal species — largest concentration in contiguous US
• first national park worldwide (established: March 1, 1872)
• gray wolf population (count: 100+ · origin: Canada · reintroduced: 1995)
• largest public bison herd — oldest and largest in US
• supervolcano caldera (last eruption: ~640,000 years ago)
• unesco world heritage site (designated: 1978)