How Crowded Is Lake Roosevelt National Recreation Area in September?

September runs about 1.1× Lake Roosevelt National Recreation Area's average month, which makes it an average month here — roughly 9% of the park's yearly visitors come in September.

In a typical September the park sees about 113,000 recreation visits, based on National Park Service monthly counts from 1979 to 2025.

That makes September the 4th-busiest of the park's twelve months, sitting between the July peak (2.5×) and the December low (0.3×).

On our Best Time to Visit score September rates 62/100 ("Good"), versus the top-rated May at 79/100 — the best overall balance of crowds and daylight.

Because June, July and August together draw about 54% 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 12.3 hours of daylight in September to explore — between the 8.2-hour midwinter low and the 15.8-hour summer high.

Park-wide, 2025 drew 1,183,757 recreation visits, up 8.5% from 1,091,489 in 2024.

Across the past decade overall visitation has eased about 12.4%, so September may feel a touch quieter than it once did.