Disclaimer

Last updated: April 2026

Informational use only

WhenToVisitParks publishes data, scores, rankings, and analysis about crowd levels and the best time to visit US national parks. Everything on whentovisitparks.com is provided for general informational and educational purposes only. It is not professional advice and should not be relied on as the sole basis for any consequential decision.

Nothing on whentovisitparks.com constitutes financial, legal, medical, tax, investment, real-estate, insurance, or engineering advice. Always consult a qualified, licensed professional for decisions that affect your money, health, safety, legal status, or property.

Data source and accuracy

The underlying data displayed on whentovisitparks.com is derived from the National Park Service Visitor Use Statistics program and the NOAA NCEI U.S. Climate Normals (1991–2020). We do our best to process that data faithfully, but we make no representations or warranties — express or implied — about the completeness, accuracy, reliability, suitability, or availability of any information, analysis, or related graphics.

Source records may contain errors, be incomplete, be reported late, or be restated by the issuing agency after publication. Where the source corrects a record, WhenToVisitParks will follow on the next refresh — but there may be a lag. Always verify any figure against the original source before acting on it.

How we process this data: For every NPS unit that reports monthly visitation (1979–present), we compute a crowd index where 1.0 equals that park\'s average month, then identify its busiest and quietest months and its multi-decade trend. We match each park to the nearest NOAA climate-normals station for monthly temperature, precipitation and snowfall, and compute average daylight hours from latitude. The Best Time to Visit Score combines crowd avoidance (40%), weather comfort (45%) and daylight (15%); the headline recommendation surfaces the shoulder-season month with good weather but below-median crowds. Weights are published and the underlying data is public domain.

Refresh cadence: Crowd data is refreshed annually when the National Park Service publishes the prior year\'s monthly visitation; climate normals update on NOAA\'s decadal cycle.

Known limitations of this source: NPS counts recreation visits, which approximate but do not exactly equal unique people, and a few remote units sit far from any climate station, so their weather figures are lower-confidence or omitted. Crowd patterns describe a typical year, so a specific holiday weekend or event can run far busier than the monthly average.

No warranties

whentovisitparks.com is provided on an "as is" and "as available" basis, without warranty of any kind, either express or implied, including but not limited to warranties of merchantability, fitness for a particular purpose, non-infringement, or course of performance.

No professional relationship

Reading, using, linking to, or sharing whentovisitparks.com does not create any advisor-client, attorney-client, doctor-patient, or fiduciary relationship between you and WhenToVisitParks or its operators.

Third-party links and advertising

whentovisitparks.com contains links to third-party websites and displays advertisements served by third parties (including Google AdSense). We do not endorse, control, or assume responsibility for the content, products, services, or practices of any third party. Following a link or clicking an ad is at your own risk.

Rankings and scores

Any rankings, grades, or composite scores published on whentovisitparks.com are editorial opinions derived from public data using documented methodologies. They are not professional certifications, accreditations, or endorsements, and they are not a substitute for independent due diligence.

Limitation of liability

In no event will WhenToVisitParks, its operators, contributors, or data providers be liable for any loss or damage — including, without limitation, indirect, incidental, consequential, or punitive damages, or any loss of profits, data, or goodwill — arising out of or in connection with the use of whentovisitparks.com or reliance on any information it contains.

External sites

When whentovisitparks.com links out to government agencies, research organizations, or news publications, those external sites are governed by their own terms and privacy policies. WhenToVisitParks is not responsible for their content or practices.

Changes to this disclaimer

We may update this disclaimer at any time. Continued use of whentovisitparks.com after changes are posted constitutes acceptance of the updated disclaimer. The "Last updated" date above reflects the most recent revision.

Contact

Questions about this disclaimer or a specific page? contact@whentovisitparks.com.