How Crowded Is Colorado National Monument in September?

September runs about 1.3× Colorado National Monument's average month, which makes it a busy month here — roughly 11% of the park's yearly visitors come in September.

In a typical September the park sees about 48,000 recreation visits, based on National Park Service monthly counts from 1979 to 2025.

That makes September the 2nd-busiest of the park's twelve months, sitting between the May peak (1.3×) and the February low (0.6×).

On our Best Time to Visit score September rates 19/100 ("Poor"), versus the top-rated February at 81/100 — the best overall balance of crowds and daylight.

Because June, July and August together draw about 32% of annual visitors, choosing September instead steps outside that summer crush — the single biggest lever on how crowded the park feels.

You'll have about 12.2 hours of daylight in September to explore — between the 9.3-hour midwinter low and the 14.7-hour summer high.

Park-wide, 2025 drew 483,436 recreation visits, down 0.9% from 488,038 in 2024.

Across the past decade overall visitation has risen about 23.5%, so a September visit is likely to feel busier than it did a few years ago.