Directs federal land and homeland security agencies to build and maintain at least 584 miles of navigable roads and related security features on certain federal lands within 10 miles of the southern border to improve CBP access and border control. It requires interagency cooperation on fencing, surveillance, and temporary structures, preserves CBP authorities in wilderness areas while adhering to applicable environmental laws, and bars Interior and Agriculture from restricting CBP activities on covered federal lands within 100 miles of the border.

Creates policies to reduce environmental damage on public lands, increases penalties for prohibited acts, launches cleanup programs for illegal cannabis contamination, and authorizes funding for wildfire fuels management near the southern border. It also prohibits using federal funds to house specified non‑admitted aliens on lands managed by federal land agencies, revokes a specific lease at Floyd Bennett Field, and requires recurring reports to Congress on implementation and outcomes.