Colorado trespassing laws divide the offense into three degrees, ranging from a petty offense for walking onto open land without permission to a class 5 felony for entering fenced agricultural land intending to commit another felony. The same conduct can also produce a civil lawsuit from the property owner, and if the trespass is an entry into someone’s home, the occupant has unusually broad authority to respond with force under the state’s Make My Day law.
The Three Degrees of Criminal Trespass
Which degree applies turns on what kind of property was entered and what the person intended once inside.
Third-Degree Trespass
Third-degree trespass under C.R.S. 18-4-504 is the baseline offense: entering or remaining on someone else’s property without permission. It is normally a petty offense. The charge climbs to a class 5 felony when a person trespasses on agricultural land intending to commit a felony there, or to a class 6 felony if that agricultural land was not fenced.1Justia. Colorado Revised Statutes Section 18-4-504 – Third Degree Criminal Trespass
Second-Degree Trespass
Second-degree trespass under C.R.S. 18-4-503 covers three situations: entering or remaining on property that is fenced or otherwise enclosed to keep people out, entering the common areas of a hotel, apartment building, or condominium without authorization, and entering someone else’s motor vehicle. Entering fenced property or restricted common areas is a petty offense; entering a vehicle without permission is a class 2 misdemeanor. The charge becomes a class 5 felony if the fenced property is agricultural land and the person intends to commit a felony there.2Justia. Colorado Revised Statutes Section 18-4-503 – Second Degree Criminal Trespass
First-Degree Trespass
First-degree trespass under C.R.S. 18-4-502 is the most serious. It applies when someone knowingly enters or remains in another person’s dwelling without permission, or enters a motor vehicle with the intent to commit a crime inside. Entering a dwelling is a class 1 misdemeanor, but it becomes a class 6 felony if the dwelling is inhabited or occupied when the entry happens. Entering a motor vehicle with criminal intent is a class 1 misdemeanor.3Justia. Colorado Revised Statutes Section 18-4-502 – First Degree Criminal Trespass
The line between first- and second-degree trespass often comes down to whether prosecutors can prove the property was a “dwelling,” meaning a place where someone lives or sleeps, rather than just an enclosed space.
Penalties by Offense Level
Colorado’s sentencing structure sets specific maximums for each classification the trespass statutes use.
- Petty offense: up to 10 days in jail and a fine of up to $300. Applies to basic third-degree trespass on non-agricultural land and to second-degree trespass on fenced property or restricted common areas.
- Class 2 misdemeanor: up to 120 days in jail and a fine of up to $750. Applies to entering someone else’s motor vehicle without permission under the second-degree statute.4Justia. Colorado Revised Statutes Section 18-1.3-501 – Misdemeanor Penalties
- Class 1 misdemeanor: up to 364 days in jail and a fine of up to $1,000. Applies to first-degree trespass into an unoccupied dwelling and to entering a motor vehicle with criminal intent.4Justia. Colorado Revised Statutes Section 18-1.3-501 – Misdemeanor Penalties
- Class 6 felony: one year to 18 months in prison and a fine between $1,000 and $100,000. Applies to first-degree trespass into an inhabited dwelling and to agricultural trespass with felony intent on unfenced land.
- Class 5 felony: one to three years in prison and a fine between $1,000 and $100,000. Applies to agricultural trespass with felony intent on fenced land.
A felony conviction reaches well beyond the sentence. It can disqualify you from certain professional licenses, restrict firearm ownership, and create obstacles to employment and housing. Judges may also impose probation, restitution for any property damage, or protective orders barring future contact with the property owner.
Common Defenses to a Trespass Charge
Colorado’s higher-degree trespass offenses require the prosecution to prove that the entry was knowing and unlawful. That requirement opens several practical defenses.
Lack of knowledge. If you genuinely did not know you were on private property, you may have a defense. This comes up where boundary lines are unclear, signage is missing, or the land looks like public space. A person who reasonably believed they had a right to be where they were often does not meet the statute’s unlawful-entry element.
Consent. If the property owner or someone with authority gave permission, there is no unlawful entry. Consent can be implied, as when someone walks up an open path to a front door during normal hours, and it can also come from a third party the accused reasonably believed had authority to grant access.
Necessity. Colorado recognizes necessity when someone enters property to avoid a greater harm. Seeking shelter during a severe storm or crossing private land to reach a medical emergency can qualify. To succeed, you generally need to show the threat was immediate, there was no reasonable alternative, you did not create the dangerous situation, and the trespass caused less harm than the emergency would have.
Legal authority. Government officials, utility workers, and emergency personnel performing their duties often have a lawful right to enter private property. A trespass charge will not hold when the entry was authorized by law or a valid court order.
When a Homeowner Can Use Force Against an Intruder
Colorado’s Make My Day statute, C.R.S. 18-1-704.5, gives the occupant of a dwelling unusually broad authority to use force, including deadly force, against someone who has entered unlawfully. All three of the following must be true:
- The occupant reasonably believes the intruder has committed, is committing, or intends to commit a crime inside the dwelling beyond the uninvited entry itself.
- The occupant reasonably believes the intruder might use any physical force, however slight, against someone in the dwelling.
- The other person entered the dwelling without permission.
When those conditions are met, the occupant is immune from both criminal prosecution and civil liability for injuries or death caused by the force used.5Justia. Colorado Revised Statutes Section 18-1-704.5 – Use of Deadly Physical Force Against an Intruder
The law only reaches inside a dwelling. It does not cover trespassers in the yard, on farmland, or in a detached garage. Outside the home, Colorado’s general self-defense rules under C.R.S. 18-1-704 apply, which require force to be proportional to the threat and generally do not permit deadly force to protect property alone.
Suing a Trespasser in Civil Court
Criminal charges and a civil lawsuit are separate tracks, and a property owner can pursue the civil case without any criminal prosecution. Civil trespass does not require proof that the trespasser intended anything wrong. The owner only has to show that someone entered the property without authorization. If no physical harm resulted, the owner can still recover nominal damages of one dollar, which puts the legal violation on the record.6Colorado Judicial Branch. Chapter 18 Trespass to Land and Private Nuisance
When actual harm occurs, courts can award compensation for the cost of restoring the property, lost rental value or business income, diminished market value, and the owner’s personal discomfort or loss of use. Colorado case law has recognized damages for contamination that migrates through soil and groundwater, destruction of a business relationship, and mental suffering when the trespass was motivated by malice.6Colorado Judicial Branch. Chapter 18 Trespass to Land and Private Nuisance
Injuries to Trespassers on Your Property
Colorado property owners generally owe minimal duty of care to adult trespassers. The duty is significantly higher when children are involved. Under the attractive nuisance doctrine, an owner can be held liable for injuries to trespassing children when the property contains a man-made condition likely to attract children who cannot appreciate its danger. Swimming pools, trampolines, construction equipment, wells, and treehouses are common examples.
Liability can apply even without any invitation. If the owner knows or should know that children are likely to enter and that a feature on the property poses a serious risk, the law treats those children more like invited guests than intruders. Warning signs alone are usually not enough. Courts look at whether the owner took real steps to prevent access, such as fencing a pool or locking construction equipment.
Trespassing on Federal Land in Colorado
Millions of acres in Colorado are federal land managed by agencies like the Bureau of Land Management, the National Park Service, and the U.S. Forest Service. Trespass on those lands is governed by federal regulations rather than the Colorado statutes above, and it carries its own penalties.
On general federal property, entering or remaining in areas closed to the public violates federal conduct rules and can be punished by up to 30 days in jail and a $5,000 fine.7U.S. Department of Homeland Security. Federal Rules and Regulations for Conduct on Federal Property On BLM-managed public lands, using or occupying land without required authorization, or exceeding the terms of a permit, is trespass. A knowing and willful violation can bring up to 12 months in jail and a $1,000 fine.8eCFR. Title 43 Subpart 2808 Trespass These cases are handled in federal court, and a conviction produces a federal criminal record.