Gateway Arch National Park Boundary Revision Act of 2026

This bill proposes to update the official boundaries of Gateway Arch National Park in Missouri by increasing the designated acreage from 100 to 102.18 acres. It achieves this by amending the 1954 enabling legislation to reference a new boundary map titled "Gateway Arch National Park Proposed Boundary Revision," which was dated August 2023. The change directly affects the park's legal description and land management guidelines but does not alter the park's core operations or visitor access. The legislation is referred to the House Committee on Natural Resources for further review.