Yellowstone National Park hosted 640,068 visits in September, the the third busiest on record, but down 8.79 percent from September 2016.

Visits may have declined due to several days of snowy weather. Road closures resulting from snow, ice and avalanche danger occurred on seven days. Portions of the Beartooth Highway were also closed from Sept. 15 to 28.

So far in 2017, the park has hosted 3,872,776 visits, down 2.47 percent from the same period in 2016 (which was the highest on record). Even with the decline, year-to-date visitation in 2017 is 19.6 percent higher than that of five years ago.

Given the continued high level of visitation at Yellowstone, the park's staff is encouraging visitors to plan their trip, anticipate delays at popular attractions and to check road conditions on the park’s website.

Detailed park visitation information and additional information on how these statistics are calculated is available online.