Park Statistics

Hagerman Fossil Beds National Monument preserves the fossil remains of more than 140 fossil species from the Pliocene epoch (5.3 to 2.6 million years ago) and is recognized as one of North America's most important localities concerning the evolution of the horse. The park's geologic strata are a slice of the Pliocene, providing a detailed record of an evolving environment that spans at least 500,000 years. It includes fossils found nowhere else in the world. The density, diversity, and quality of fossils led to the site being designated as a national natural landmark in 1975, and a National Monument in 1988.

Hagerman Fossil Beds National Monument lies within a scenic region of southern Idaho where sandy bluffs, basalt canyons, waterfalls, and hot springs are interspersed between vineyards, ranches, and farms producing various crops including sugar beets, potatoes, and onions. The 4,394-acre park lies just west of the town of Hagerman. The unit was established November 18, 1988, through an act of Congress (Public Law 100-696) and is one of the few federally administered fossil sites specifically set aside for paleontological research. The park's fossil beds offer a world-class setting to conduct research that can better enable the scientific community, the public, and land managers to understand the past.

The park lies along the Snake River and includes 7 miles of river shoreline. Elevation of the park ranges from 3,508 feet at the top of the bluff to 2,799 feet at the base of the river. The climate in the region is semiarid. Precipitation averages less than 10 inches per year, with most occurring in the early spring and late fall. Winters are cold (average low is 19 degrees Fahrenheit (°F), and summers are hot (average high is 91°F).

Last updated: June 18, 2017

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Mailing Address:

PO Box 570
Hagerman, ID 83332


(208) 933-4105

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