Wanderlust World Wanderlust World According to the National Park Service, Yellowstone National Park recorded 4,860,525 recreational visits in 2021. Visitation fluctuates yearly due to weather, economic conditions, and global events (e.g., the COVID-19 pandemic). The park typically sees peak crowds in summer (June–August) and lower numbers in winter, though winter tourism has grown with snowmobile and snowcoach access.