Hagerman Horse Fossil
Official State Fossil of Idaho
The Hagerman horse fossil was designated the official state fossil of Idaho in 1988. All State Fossils
3.5 million year old sediments at the Hagerman Fossil Beds National Monument in Idaho contain the world's richest known fossil deposits from the late Pliocene epoch (200 horse skeletons have been recovered at the Hagerman Fossil Beds, 20 of which are complete).