🏆 Official Guide: Ashfall Fossil Beds State Historical Park — The “Pompeii of Prehistoric Animals” — a world-renowned paleontological site in Antelope County, Nebraska — preserving hundreds of complete, articulated skeletons of 12-million-year-old Miocene animals (barrel-bodied rhinos, three-toed horses, camels) entombed by volcanic ash from a supervolcanic eruption in southwestern Idaho — featuring the 17,500-sq-ft Hubbard Rhino Barn (fossils displayed in situ — watch paleontologists excavate), a visitor center with fossil preparation lab, interpretive displays — National Natural Landmark (2006) — open early May through early October.
Ashfall Fossil Beds State Historical Park is one of the most extraordinary fossil sites on Earth — a place where an entire ecosystem was frozen in time 12 million years ago. When a supervolcano in present-day Idaho erupted, it sent a cloud of fine volcanic ash across the Great Plains. Animals gathered at a watering hole in what is now northeast Nebraska, inhaled the ash over days and weeks, and died where they stood. The result: hundreds of perfectly preserved, articulated skeletons — not scattered bones, but complete animals in their death positions. It’s a paleontological treasure without parallel.
Visitor Information
| Detail | Information |
|---|---|
| Location | Antelope County, NE — near Royal |
| Age of Fossils | ~12 million years (Miocene Epoch) |
| Cause of Death | Volcanic ash inhalation — supervolcano in SW Idaho |
| Designation | National Natural Landmark (2006) |
| Season | Early May – early October |
| Managed By | University of Nebraska State Museum |
What to See
| Feature | Details |
|---|---|
| Hubbard Rhino Barn | 17,500 sq ft — built over excavation — fossils displayed in situ |
| Active Excavation | Watch paleontologists work — summer season |
| Visitor Center | Interpretive displays + working fossil prep lab |
| Species Found | Barrel-bodied rhinos (Teleoceras), three-toed horses, camels, deer, turtles, birds |
| Ash Deposit | 8–10 ft deep at the watering hole site |
Discovery & History
| Year | Event |
|---|---|
| 1971 | Discovered by paleontologist Michael Voorhies — baby rhino skull eroding from gully |
| 1986 | Site purchased by NE Game & Parks Foundation |
| 1991 | Park opened to public |
| 2006 | Designated National Natural Landmark |
Frequently Asked Questions
Why are the fossils so well preserved?
A supervolcanic eruption in present-day southwestern Idaho blanketed the Great Plains with fine volcanic ash ~12 million years ago. Animals at a watering hole in northeast Nebraska inhaled the ash over days and weeks, dying where they gathered. The ash — 8 to 10 feet deep — buried them in their death positions before scavengers could scatter the bones. The result is hundreds of complete, articulated skeletons — one of the most extraordinary fossil preservation events ever discovered.
Can I see active excavation?
Yes — during the summer season (typically June through August), paleontologists from the University of Nebraska actively excavate in the Hubbard Rhino Barn. You can watch them work and ask questions. The visitor center also has a working fossil preparation lab where fossils are cleaned and preserved. The park is open early May through early October.
More parks nearby: Niobrara State Park is within about an hour’s drive, while War Axe State Recreation Area lies within about an hour’s drive.
