Several sets of various size tracks from the ichnogenus *Chelichnus* in the Coconino Sandstone. Tracks are found along the Hermit trail in Grand Canyon National Park.
http://www.nature.nps.gov/geology/paleontology/pub/fossil_conference_6/hunt.htm
This fossil found within Grand Canyon National Park, Arizona and is managed in situ. Learn about paleontology in the National Park Service: https://www.nps.gov/subjects/fossils/index.htm
Learn more about Grand Canyon National Park’s Centennial: https://www.nps.gov/grca/getinvolved/centennial.htm