The network's seasonal shape.
Each row below sums Recreation Visits across every NPS unit that reports data, for that calendar month, averaged over the 2021-2025 window. The bar widths are proportional to the busiest month.
National Parks specifically (the 63 units with the official "National Park" designation) follow the same shape but with sharper summer compression — the marquee parks are mostly seasonal:
| Month | Network total | Parks only | Parks share |
|---|---|---|---|
| January | 13,668,655 | 2,818,250 | 21% |
| February | 14,781,248 | 3,112,714 | 21% |
| March | 23,452,151 | 5,179,444 | 22% |
| April | 27,397,432 | 5,955,358 | 22% |
| May | 32,571,152 | 8,325,773 | 26% |
| June | 40,054,110 | 11,138,517 | 28% |
| July | 43,972,799 | 12,767,442 | 29% |
| August | 38,674,379 | 11,175,345 | 29% |
| September | 32,551,044 | 9,652,382 | 30% |
| October | 29,377,126 | 8,046,248 | 27% |
| November | 20,043,758 | 4,549,307 | 23% |
| December | 17,091,735 | 3,709,786 | 22% |
How to read the curve
The peak-to-quietest ratio at the network level (~3×) understates how seasonal individual parks actually are. Yellowstone's ratio is closer to 40×; Glacier's is higher still. The network curve flattens because warm-weather units fill in the winter months. For per-park month-by-month curves, see the best-time-to-visit pages — Yellowstone, Yosemite, and Grand Canyon are linked below.
For year-over-year network totals see visitation by year. For the season's effect on specific parks see best time to visit.
Methodology
Visit counts are official "Recreation Visits" from the NPS Visitor Use Statistics Data Package, 2025. The five-year average column averages 2021-2025 to reduce single-year noise; the latest-year column shows the most recent complete calendar year. Some NPS units publish other statistic types (Tent Campers, Recreation Visit Hours) that are not used here. Independent site, not affiliated with the National Park Service. Monthly aggregation uses the 5-year mean from the per-unit monthly visitation dataset. Some units don't yet have a complete five-year window of monthly data; those units' contributions are smaller until the next annual refresh.
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.