What is the state fossil of Montana?

The state fossil of Montana is the dinosaur fossil of the “Tyrannosaurus rex.” Montana is known for its rich paleontological sites, especially in the Hell Creek Formation, where the T. rex fossils have been found. The T. rex, one of the largest and most well-known carnivorous dinosaurs, roamed the area about 66 million years ago. Montana’s fossil-rich landscape makes it a popular destination for paleontologists and fossil enthusiasts. The T. rex was designated as the state fossil in 1985, acknowledging the state’s significant role in paleontology.