C.R.S. § 18-4-504
18-4-504. Third degree criminal trespass
18-4-504. Third degree criminal trespass. (1) A person commits the crime of third degree criminal trespass if such person unlawfully enters or remains in or upon premises of another.
(2) Third degree criminal trespass is a petty offense, but:
(a) Repealed.
(b) It is a class 5 felony if the person trespasses on premises classified as agricultural land with the intent to commit a felony thereon; except that it is a class 6 felony if the agricultural land did not have a fence securing the perimeter.