A rich trove of flying dinosaur tracks have been found on Denali. One of the dinosaurs was named Magnoavipes denaliensis, which roughly translates into “damn-big flying Denali reptile” according this article. The article notes Denali “the richest record of avian biodiversity from a single rock unit anywhere in the world, (and) the fact that some of the forms of bird tracks we found in Alaska are also found elsewhere in the U.S. and Asia suggests that birds used Alaska as a seasonal nesting ground some 70 million years ago … just like modern birds use Alaska today.”