How Crowded Is Lewis and Clark National Historical Park in August?
August runs about 1.8× Lewis and Clark National Historical Park's average month, which makes it a very busy month here — roughly 15% of the park's yearly visitors come in August.
In a typical August the park sees about 40,000 recreation visits, based on National Park Service monthly counts from 1979 to 2025.
That makes August the 2nd-busiest of the park's twelve months, sitting between the July peak (1.9×) and the December low (0.4×).
On our Best Time to Visit score August rates 50/100 ("Fair"), versus the top-rated May at 59/100 — best overall balance of crowds, weather and daylight.
Typical August weather, from 1991–2020 NOAA climate normals at the nearest station, averages a daytime high near 69°F and an overnight low around 54°F, with about 1.1" of precipitation.
That average of about 61°F is a comfortable range for hiking and being outdoors all day.
August falls inside the park's busiest stretch: June, July and August together pull about 44% of the year's visitors, so a visit this month means sharing the park with the peak-season crowd.
You'll have about 14 hours of daylight in August to explore — between the 8.4-hour midwinter low and the 15.6-hour summer high.
Park-wide, 2025 drew 244,195 recreation visits, down 8.6% from 267,118 in 2024.
Frequently Asked Questions
August is very busy at Lewis and Clark National Historical Park (about 1.8× the average month). Our best-time score rates it "Fair". The single best month overall is May.
The busiest month is July and the quietest is December. August sits at about 1.8× the park's average, or 15% of annual visitation.
A typical August sees about 40,000 recreation visits at Lewis and Clark National Historical Park, based on National Park Service monthly counts from 1979–2025.
Where to stay near Lewis and Clark in August
Booking a August trip to Lewis and Clark National Historical Park? Compare hotels, cabins and vacation rentals near the park with live August availability and prices.
Top-rated places to stay near Lewis and Clark
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Visiting Lewis and Clark in August?
Get crowd forecasts and lodging deals for Lewis and Clark by email. No spam, unsubscribe anytime.
See the full ranking of the best national parks to visit in August.
Source: National Park Service Visitor Use Statistics (1979–2025), NOAA NCEI Climate Normals 1991–2020. Updated 2026-07-14.