Thomas Jefferson personally commissioned the first formal excavation of the site in 1807, sending William Clark to gather specimens.
The area contains a rare combination of salt springs and swampy marshland that acted as a natural trap for prehistoric megafauna.
Mammoths, mastodons, ground sloths, and ancient bison have all been excavated from the site's unique mud layers.
The site was officially designated a National Natural Landmark in 1973 for its geological significance.
The resident bison herd is managed as part of a conservation effort to reintroduce the species to the Kentucky landscape.
Early European explorers and settlers utilized the salt licks, naming the area for the massive, exposed bones found in the soil.
Big Bone Lick State Historic Site is recognized as the birthplace of American vertebrate paleontology due to its massive deposits of Pleistocene megafauna fossils. The site features a museum displaying ice-age exhibits, including skeletons of mammoths and mastodons recovered from the local salt licks. An outdoor Discovery Trail showcases recreations of these prehistoric animals in their natural habitat. The park includes a herd of living bison, which serves as a biological link to the region's ancient ecological history. Visitors can access various hiking trails that traverse woodlands, meadows, and areas surrounding the natural salt springs. Campground facilities are available for overnight stays, featuring utility hookups and primitive sites. The location is significant for its sulfur springs, which historically attracted both wildlife and human populations for salt extraction. Educational dioramas throughout the park detail the geological processes that preserved the fossils. The site is currently fully operational as part of the Kentucky State Parks system.
The elevated observation deck overlooking the bison pasture.
Check the museum's schedule for seasonal fossil-identification programs or guided geological walks.
Wear insect repellent, as the marshy areas and wooded trails can be prone to ticks and mosquitoes in warmer months.
Bring binoculars to get a better view of the bison herd, as they are kept in a large, fenced pasture area.
Do not attempt to collect fossils or rocks from the creek beds, as the site is protected and collection is strictly prohibited.
The visitor center may have reduced operations or closures during mid-winter months.
Stay on marked trails to protect sensitive archaeological layers; do not feed or approach the bison herd.
