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 its existing boundary. The Secretary of the Interior would be authorized to acquire this specific parcel, depicted on a May 2025 map, for inclusion in the park. The bill also updates a previous monetary threshold for park acquisitions to adjust for inflation using the Consumer Price Index. This change directly affects the park's boundaries and landowners within the designated 551-acre area.