The National Park Service has announced the Park Entrance Fees will change June 1st, 2015. Please see below
Please Note: New entrance fees will become effective June 1, 2015. A separate fee will be collected for entry into Grand Teton and Yellowstone National Parks. No price changes will occur for the America the Beautiful Interagency Annual Pass, the Military Annual Pass, the Interagency Senior Pass, or the Interagency Access Pass.
Beginning June 1: The new entrance fees beginning on June 1 provide a 7-day entrance permit for Yellowstone National Park only. The prices are: $30 for a private, noncommercial vehicle; $25 for a motorcycle; or $15 for each visitor 16 years and older entering by foot, bicycle, ski, etc. At this time, people visiting both parks can save money by purchasing a two-park pass. The prices will be: $50 for a private, noncommercial vehicle; $40 for a motorcycle; or $20 for each visitor 16 years and older entering by foot, bicycle, ski, etc.