Mammoth Cave National Park Boundary Adjustment Act of 2025

This bill would expand Mammoth Cave National Park by adding approximately 551 acres of land in Edmonson and Barren Counties, Kentucky, to the park's existing boundaries. The legislation modifies existing law to allow the Secretary of the Interior to acquire this specific parcel of land, as shown on a map dated May 2025. The acquisition is subject to a financial threshold adjusted for inflation, referenced in the updated law. This change directly affects the park's management and the landowners whose property would be added to the protected area.