Fossil footprints from the Dakota Group (Cretaceous) John Martin Reservoir, Bent County, Colorado: New insights into the paleoecology of the Dinosaur Freeway

► Eight new tracksites were found from the Cretaceous Dakota Group in Colorado. ► Some trackways suggest the gregarious behavior of ornithopods. ► The tracks are attributed to abundant ornithopod and crocodiles. ► Most of the crocodile tracks are swim track. ► The first pterosaur tracks from the Dakota Group are also reported.