The National Park Service celebrates its 98th birthday on Monday, August 25. To celebrate, admission to Yellowstone and Grand Teton national parks, as well as all other national parks, is free that day.
The Park Service is waiving entrance fees on 9 days in 2014 as a way to encourage people to get outdoors and enjoy the remarkable landscapes and historical and cultural sites national parks have to offer.
Fees for campsites and other incidental fees are still in effect, according to a statement released by the National Park Service.
Other fee free dates still to come this year are National Public Lands Day on September 27 and Veterans Day, November 11.
A seven-day pass to Yellowstone and Grand Teton National Parks is normally $25 for a private, non-commercial vehicle.
More information is available at http://www.nps.gov/findapark/feefreeparks.htm.