During the day, the centennial summerfest will bring together park partners to showcase everything Arizona has to offer.
At night, park visitors can explore the wonders of the night sky at the star party. To kick off its star party, Grand Canyon National Park will celebrate its designation as an International Dark Sky park. Grand Canyon National Park's South Rim visitors can learn about dark skies with the Tucson Amateur Astronomy Association and on the North Rim with the Saguaro Astronomy Club of Phoenix. Amateur astronomers from across the country volunteer their expertise and offer free nightly astronomy programs and telescope viewing.