How Crowded Is Valles Caldera in September?
September is a very busy month at Valles Caldera National Preserve, running about 1.7× the park's average month — roughly 14% of the year's visitors come in September. It is in fact the busiest month of the year here, so expect full parking lots, busy trails and booked-out campgrounds. If crowds bother you, February (the quietest month) or the recommended June are easier. Typical September weather averages a high near 66°F and a low around 36°F, with about 2.2" of precipitation. You'll get about 12.2 hours of daylight to explore.
Frequently Asked Questions
September is very busy at Valles Caldera National Preserve (about 1.7× the average month). Our best-time score rates it "Poor". The single best month overall is June.
The busiest month is September and the quietest is February. September sits at about 1.7× the park's average, or 14% of annual visitation.
Source: National Park Service Visitor Use Statistics (2020–2025), NOAA NCEI Climate Normals 1991–2020. Updated 2026-06-20.