An oldie but goodie. And we mean old: The tracks that appear to climb up the sandstone mountainside were made in a muddy streambed more than 165 million years ago by passing ornithopods and theropods. Pull over over on the side of the hill across from Red Rocks Park and take a gander at this National Natural Landmark, or pick up an interpretive brochure at the Visitors Center at the bottom of the ridge for a more educated look. And groups of a dozen or more can go whole hogback by signing up for a guided tour with Friends of Dinosaur Ridge.