As I stated above the main feature is a sandstone surface covered (and I mean covered) with dinosaur footprints. The site was discovered in the mid-1960s by a highway construction project and the park was opened in 1968. A large dome protects the trackways. Over 500 tracks are exposed and at least three times that many are buried for preservation.
This place is a great resource and I know that it made a lasting impression on me as a child (I am originally from Connecticut).