Montana

The world's most extensive collection of fossils from Hell Creek is on display at the Museum of the Rockies in Bozeman.

An excerpt from the article 35 facts about Montana
In 1998, Montana State University, the University of Washington, the University of California, Berkeley, the University of North Dakota, and the University of North Carolina launched a joint excavation program that resulted in numerous finds. One of the most recent successes was the discovery of a 20% complete skeleton of "Tufts-Love Rex," a Tyrannosaurus rex with a well-preserved skull.