John Day Fossil Beds National Monument in central Oregon protects layered claystone and colorful hills that record the Age of Mammals. Spread across three units — Sheep Rock, Painted Hills, and Clarno — the monument has yielded fossils of extinct rhino-like brontotheres, three-toed horses, saber-tooth cats, and camels, showing how the climate cooled and forests gave way to drier grasslands. The National Park Service runs the Thomas Condon Paleontology Center, where visitors can see unearthed fossils up close.
At a glance
The facts worth checking before you roll out
Conservative, source-minded facts for planning your visit — always worth confirming against current conditions before you travel.
State
Oregon
Managed by
National Park Service
Units
Sheep Rock, Painted Hills, Clarno
Visitor center
Thomas Condon Paleontology Center
On the ground
The monument is split into three units, each with its own character. The National Park Service describes Sheep Rock as eroded claystone that reveals the past, the Painted Hills as ancient fossilized soils, and Clarno as towering cliffs — distinct landscapes spread across central Oregon.
The fossils record what the NPS calls the Age of Mammals. Discoveries here include rhino-like brontotheres, three-toed horses, saber-tooth cats, and camels, and the rock layers track how the climate cooled and forests shifted to drier grasslands over time.
The Thomas Condon Paleontology Center is described as the best place to see fossils in the monument, where visitors can view unearthed specimens and learn about Oregon's geological history. Because the units are separated by miles of driving, plan your route and confirm current access on the National Park Service site before you set out in the RV.
Official sources
- National Park Service — John Day Fossil Beds National Monument National Park Service
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