John Day Fossil Beds National Monument is a U.S. national monument in Wheeler and Grant counties in east-central Oregon. Located within the John Day River basin and managed by the National Park Service, the park is known for its well-preserved layers of fossil plants and mammals that lived in the region between the late Eocene, about 45 million years ago, and the late Miocene, about 5 million years ago. The monument consists of three geographically separate units: Sheep Rock, Painted Hills, and Clarno.

Wheeler County is a county in the U.S. state of Oregon. As of the 2020 census, the population was 1,451, making it Oregon's least populous county. It is named in honor of Henry H. Wheeler. an early settler who owned a farm near Mitchell. The county seat is Fossil, and Wheeler County is known for having Oregon's largest deposit of fossils.