Every NPS unit in Wyoming.
Wyoming's 10 NPS units: 4 National Historic Trails · 2 National Monuments · 2 National Parks · 1 National Recreation Area · 1 National Historic Site. Combined 5-year-average annual visits: 8,741,968 (multi-state units count their full visits in every state they touch — see methodology). The most-visited unit is Yellowstone National Park at about 4.43M annual visits.
| Unit | Designation | 5-yr avg visits | Busiest month |
|---|---|---|---|
| Yellowstone National Park | National ParkYELL | 4,431,841 | July |
| Grand Teton National Park | National ParkGRTE | 3,507,486 | July |
| Devils Tower National Monument | National MonumentDETO | 519,765 | July |
| Bighorn Canyon National Recreation Area | National Recreation AreaBICA | 220,619 | July |
| Fort Laramie National Historic Site | National Historic SiteFOLA | 42,152 | July |
| Fossil Butte National Monument | National MonumentFOBU | 20,105 | July |
| California National Historic Trail | National Historic TrailCALI | — | — |
| Mormon Pioneer National Historic Trail | National Historic TrailMOPI | — | — |
| Oregon National Historic Trail | National Historic TrailOREG | — | — |
| Pony Express National Historic Trail | National Historic TrailPOEX | — | — |
Methodology
Unit list and per-unit visit counts come from the official NPS Visitor Use Statistics Data Package, 2025. The "5-year average visits" column is the mean of 2021-2025 Recreation Visits. Multi-state NPS units (Yellowstone, Death Valley, Great Smoky Mountains and others) are listed under every state they touch; the per-unit visit count is the unit's total, not a per-state share. Independent site, not affiliated with the National Park Service.
Independent site. Not affiliated with or endorsed by the National Park Service. Data comes from the official NPS Visitor Use Statistics Data Package, 2025; editorial analysis is ours. The NPS Arrowhead and other NPS marks are not used.