Park officials said Wednesday they changed the way they count the overall number of visitors last year, making accurate comparisons to previous years impossible.
But officials say statistics at individual park entrances can still be compared year-to-year.
The Beaver Meadows entrance, the park's busiest, recorded 1.3 million visitors, down almost 18 percent from 2011. The Fall River entrance was down 1 percent to about 805,000 and Grand Lake was up more than 3 percent to about 432,000.
Park officials say unusual weather, construction on a major park road and wildfires in and outside the park affected visitor numbers.