Rocky Mountain National Park recorded the highest number of annual visitors ever this past year. A total of 3,251,317 visitors spent time in the park in 2012, which represents a 2.3% increase over 2011. The 2012 year also marks the eighth time that visitation exceeded 3 million in the park's history. 1978 was the first year.
Here's a look at annual visitation trends since Rocky Mountain became a park in 1915: