Every NPS unit in Colorado.
Colorado's 17 NPS units: 5 National Monuments · 4 National Historic Trails · 3 National Historic Sites · 3 National Parks · 1 National Recreation Area · 1 National Park & Preserve. Combined 5-year-average annual visits: 7,447,255 (multi-state units count their full visits in every state they touch — see methodology). The most-visited unit is Rocky Mountain National Park at about 4.24M annual visits.
| Unit | Designation | 5-yr avg visits | Busiest month |
|---|---|---|---|
| Rocky Mountain National Park | National ParkROMO | 4,235,378 | July |
| Curecanti National Recreation Area | National Recreation AreaCURE | 956,425 | July |
| Mesa Verde National Park | National ParkMEVE | 499,331 | June |
| Great Sand Dunes National Park & Preserve | National Park & PreserveGRSA | 495,684 | June |
| Colorado National Monument | National MonumentCOLM | 487,587 | May |
| Dinosaur National Monument | National MonumentDINO | 334,989 | July |
| Black Canyon Of The Gunnison National Park | National ParkBLCA | 309,837 | June |
| Florissant Fossil Beds National Monument | National MonumentFLFO | 68,244 | June |
| Hovenweep National Monument | National MonumentHOVE | 29,695 | May |
| Bent's Old Fort National Historic Site | National Historic SiteBEOL | 18,130 | May |
| Amache National Historic Site | National Historic SiteAMCH | 6,442 | September |
| Sand Creek Massacre National Historic Site | National Historic SiteSAND | 5,513 | May |
| California National Historic Trail | National Historic TrailCALI | — | — |
| Old Spanish National Historic Trail | National Historic TrailOLSP | — | — |
| Pony Express National Historic Trail | National Historic TrailPOEX | — | — |
| Santa Fe National Historic Trail | National Historic TrailSAFE | — | — |
| Yucca House National Monument | National MonumentYUHO | — | — |
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.