Each State has laws on Claim Trespass. Here is Az for an example:
ARIZONA REVISED STATUTES 13-1504
A. A person commits criminal trespass in the first degree by knowingly:
4. Entering unlawfully on real property that is subject to a valid mineral claim or lease with the intent to hold, work, take or explore for minerals on the claim or lease.
13-1504. Criminal trespass in the first degree; classification
A. A person commits criminal trespass in the first degree by knowingly:
4. Entering unlawfully on a valid mineral claim with the intent to hold, work, take or explore for minerals on the claim .
B. Criminal trespass in the first degree under subsection A, paragraph 1, 5 or 6 is a class 6 felony. Criminal trespass in the first degree under subsection A, paragraph 2, 3 or 4 is a class 1 misdemeanor.
Mineral trespass — Penalty.
(1) A person commits the crime of mineral trespass if the person intentionally and without the permission of the claim holder or person conducting the mining operation:
(a) Interferes with a lawful mining operation or stops, or causes to be stopped, a lawful mining operation;
(b) Enters a mining claim posted as required in chapter 13-`504 and disturbs, removes, or attempts to remove any mineral from the claim site;
(c) Tampers with or disturbs a flume, rocker box, bedrock sluice, sluice box, dredge, quartz mill, or other mining equipment at a posted mining claim; or
(d) Defaces a location stake, side post, corner post, landmark, monument, or posted written notice within a posted mining claim.
(2) Mineral trespass is a class 6 felony.
Bejay