Grand Canyon National Park will waive entrance fees April 16-24, 2016 to celebrate National Park Week and the National Park Service Centennial. To join in on the week-long celebration, visitors can attend ranger programs, cultural demonstrations, and Earth Day events. https://www.nps.gov/grca/learn/news/national-park-week-fee-free-days.htm
Source:: Grand Canyon to Waive Entrance Fees during National Park Week April 16-24
