Congress·In Committee·H.R. 3286

Mammoth Cave National Park: Expanding Park Boundaries

Mammoth Cave National Park Boundary Adjustment Act of 2025

Legislative Progress

House

Senate

President

Law

This bill would allow Mammoth Cave National Park in Kentucky to grow by adding about 551 acres of land. The new land is located in Edmonson and Barren Counties and would be managed by the National Park Service.
It updates a very old rule from 1942 that limited how much money could be spent to buy land for the park. The bill adjusts that original $350,000 limit for inflation so the government can afford to buy land at today's prices.
The expansion is designed to better protect the world's longest known cave system and the natural landscape around it. This helps preserve local wildlife and keeps more land open for public use and tourism.

3 milestones3 actions

Mar 11, 2026House

Referred to the Subcommittee on Federal Lands.

May 8, 2025House

Referred to the House Committee on Natural Resources.

May 8, 2025

Introduced in House

1 bill

Mammoth Cave National Park Boundary Adjustment Act of 2025

May 8 — Read twice and referred to the Committee on Energy and Natural Resources.

Document Type

Congressional Bill

Official Title

Mammoth Cave National Park Boundary Adjustment Act of 2025

Bill NumberHR 3286

Congress119th Congress

ChamberHouse of Representatives

Latest ActionReferred to the Subcommittee on Federal Lands.

(5)

D: 1R: 4

Congress.gov

Official legislative information

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