Rocky Mountain National Park set another visitation record in 2019. The park counted 4,678,804 visits last year, a 1.9% increase over the prior year. 2019 also marked the 5th year in a row that Rocky surpassed 4 million visits. Between 1975 and 2011 the park averaged roughly 3 million visits; however, that number has rocketed upward by roughly 50% since then.
Below is a graph showing total visitor counts since the park's inception:
Ramble On: A History of Hiking
Exploring Grand Teton National Park