43 CFR § 4300.72
May I remove my personal property or improvements when the permit expires or terminates?
June 11, 2020
(a) Yes. Within 90 days of the expiration or termination of the grazing permit, or within any extension period, you may remove all your personal property and any removable range improvements you own, such as fences, corrals, and buildings.
(b) Property that is not removed within the time allowed will become property of the United States.