More than 100 people gathered in Kane County, Utah, to see fossilized footprints pressed into the sandstone by dinosaurs 185 million years ago.
"The site is outstanding for the quality of the tracks, diversity of animals represented and continuum of time they were created," said Alan Titus, a paleontologist for the Bureau of Land Management who led two tours to the location.
The site, just 3 miles from Coral Pink Sand Dunes State Park, was discovered last October in a popular riding area for all-terrain vehicles.
The area has since been closed to riders to preserve the site, named the Northern Moccasin Mountain Track Site, the Salt Lake Tribune reported.
The area is roughly the size of a football field and is covered with thousands of prehistoric footprints from the Jurassic period.
Copyright 2008 by United Press International
Explore further: The world's oldest known snake fossils: Rolling back the clock by nearly 70 million years