In 2015, there were 4,097,710 “visits” to Yellowstone National Park, up 16.6% from 2014, making it the highest visitation year on record.

The National Park Service’s “Find Your Park” public awareness campaign, marketing and tourism promotions by the states of Montana and Wyoming, and lower gas prices are being credited for the record number of visits.

“Last year’s visitation tested the capacity of Yellowstone National Park,” said Yellowstone Superintendent Dan Wenk. “We are looking at ways to reprioritize in order to protect resources, to provide additional ranger programs, and to keep facilities clean.”

The increase in visitation to Yellowstone this year brought an increase in demands on park staff, facilities and resources. Long lines to enter the park, traffic jams, and the resultant frustration of visitors and staff undoubtedly affected the visitor experience.