Yangsook Chung, left, and Manlim Choi, from Salt Lake City, take a snapshot along a short trail at a scenic overlook off Trail Ridge Road, above tree-line at Rocky Mountain National Park in Colorado, Monday, July 14, 2014.

(AP Photo/Brennan Linsley)

Visitors to Rocky Mountain National Park will have to fork over extra cash starting Thursday when fee increases take effect.

The Fort Collins Coloradoan reports that the park is introducing increased entrance fees this week, including a new day use pass.

The day use pass will cost $20 for vehicles and $10 per person entering the park on a bicycle. A seven-day pass will cost $30 for vehicles, up from $20. A seven-day pass will cost $25 for motorcycles and $15 per person on bike. An annual pass will increase from $40 to $50.

Next year the park will increase campground fees to $26.

Rocky Mountain National Park is the country's fifth-most visited national park and is on pace to see a record 4 million visitors in 2015.