Colorado Trespassing Laws: What You Need to Know

Colorado: Fast Facts on Trespassing

  • Trespass Law Covers: Residential and commercial buildings, land, vehicles.
  • Crime Class: Felony, misdemeanor or petty offense depending on degree.
  • Fencing Required?: No, but trespassing past fencing and other obstructions to entry constitutes a more severe offense.
  • Signage Required? No.
  • Verbal Notice Required? No.
flag of Colorado

Colorado Trespassing Law Overview

Compared to some other states, Colorado’s trespassing laws are brief, to the point and easy to understand. While this is something of an advantage, on the other hand the broadly inclusive language may mean you could get tagged with a trespassing charge even if you don’t really deserve it.

Colorado classifies trespassing into several degrees, first, second and third with the severity typically being dependent upon what barriers or other obstructions to entry are crossed or breached in order to main access illegally to the property and what type of property someone happens to be trespassing on.

This is an important distinction since the degree determines the penalty schedule. Trespassing in one form or another is a felony about half the time in Colorado, so you know they take it seriously.

Despite this variation in penalty schedule, the law is easy to understand for almost anyone. We will dig into it just below.

Relevant Colorado State Statutes

  • Colorado Statute 18-4-502 First degree criminal trespass
  • Colorado Statute 18-4-503 Second degree criminal trespass
  • Colorado Statute 18-4-504 Third degree criminal trespass
  • Colorado Statute 18-4-504.5 Definition of premises

The best place to begin is always at the beginning. In the case of the law, the best place to begin is always with the definitions, since common words in everyday use may entail other, specific meanings you aren’t expecting in the context of the law.

When we are talking about Colorado law that means we need to start at the end since the definitions come after the other state statutes defining and codifying trespassing.

Specifically we need the definition of “premises” in Colorado. We get it in 18-4-504.5:

18-4-504.5. Definition of premises

As used in sections 18-4-503 and 18-4-504, “premises” means real property, buildings, and other improvements thereon, and the stream banks and beds of any nonnavigable fresh water streams flowing through such real property.

Simply stated any land you own, improved or unimproved, is considered a premises for the purposes of trespassing in the state of Colorado.

This could mean outbuildings, this could mean a business it could mean a bear dirt lot. It does not matter.

“Real Property” has the simple definition of “fixed property, typically land or buildings”, so the inclusion of that terminology alone means the premises is defined about as broadly as possible in the English language.

Colorado also took a little extra ink to clarify that any body of water within, contained by or flowing through or over said premises is part of the premises.

So, in essence, a trespasser cannot make a sneaky maritime entrance on your property and get away scot-free.

Moving on to the actual statutes concerning trespassing, we begin with 18-4-502 which defines first degree criminal trespass, the most severe in Colorado:

18-4-502. First degree criminal trespass

A person commits the crime of first degree criminal trespass if such person knowingly and unlawfully enters or remains in a dwelling of another or if such person enters any motor vehicle with intent to commit a crime therein. First degree criminal trespass is a class 5 felony.

Short and sweet.

If you were to knowingly and unlawfully enter the dwelling of any other person or enter their motor vehicle with the intention of committing a crime of any kind you’re guilty of trespassing in the first degree which is a felony in Colorado.

Tell someone who enters a home with the intention of burglarizing it or invading it and taking the owner’s captive is certainly guilty of first-degree Criminal Trespass as is a carjacker or Highwayman.

For those of you out there who are real legal beagles and nitpickers, you might puzzle over what constitutes “knowingly”.

For all practical purposes if it can be proven or even suspected that you were up to no good or engaged in some nefarious task while on or in property that does not belong to you expect to get tagged with a felony in Colorado.

Doesn’t sound so bad, right? After all, you are a good guy or a good gal and are not up to no good.

Not so fast. Consider this altogether too plausible theoretical example: What if one was to accidentally stray onto someone else’s land unknowingly, and you just so happen to do so while you were armed.

Maybe you’re out hunting. Maybe you were out shooting cans and targets. If someone really wanted to press the issue, could they try to claim that you were poaching animals on their land?

I’m not saying they will, but they certainly could. Keep that in mind and pay attention where you are traveling in Colorado. While easy to understand, laws that are written broadly and inclusively like this are often ripe for abuse.

Moving swiftly along to section 18-4-503, which covers trespassing in the second degree. Slightly less severe than the previous section but still no joke in the state of Colorado:

18-4-503. Second degree criminal trespass

(1) A person commits the crime of second degree criminal trespass if such person:

(a) Unlawfully enters or remains in or upon the premises of another which are enclosed in a manner designed to exclude intruders or are fenced; or

(b) Knowingly and unlawfully enters or remains in or upon the common areas of a hotel, motel, condominium, or apartment building; or

(c) Knowingly and unlawfully enters or remains in a motor vehicle of another.

(2) Second degree criminal trespass is a class 3 misdemeanor, but:

(a) It is a class 2 misdemeanor if the premises have been classified by the county assessor for the county in which the land is situated as agricultural land pursuant to section 39-1-102 (1.6), C.R.S.; and

(b) It is a class 4 felony if the person trespasses on premises so classified as agricultural land with the intent to commit a felony thereon.

(3) Whenever a person is convicted of, pleads guilty or nolo contendere to, receives a deferred judgment or sentence for, or is adjudicated a juvenile delinquent for, a violation of paragraph (c) of subsection (1) of this section, the offender’s driver’s license shall be revoked as provided in section 42-2-125, C.R.S.

Subsection one paragraph (a) defines trespassing where one had to bypass fencing or other obstacles designed to exclude intruders or knowingly and unlawfully remaining in the “common” areas of a hotel, condominium, apartment and similar buildings as a second-degree misdemeanor.

It also notes second degree trespassing may be upgraded to felony status instead of a misdemeanor if one trespasses on agricultural land with the intent to commit a felony on that land.

This language is similar to that found in the previous section for first-degree trespassing.

Subsection 1 paragraph (c) details that entering unlawfully and remaining in the motor vehicle of another person is trespassing in the second degree.

This is distinct from the definition in the previous section for first-degree trespassing in that you have entered and remained in the vehicle with no intent to commit a crime. Possibly a small but important difference.

Lastly we come to trespassing in the third degree, defined in 18-4-504:

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 class 1 petty offense, but:

(a) It is a class 3 misdemeanor if the premises have been classified by the county assessor for the county in which the land is situated as agricultural land pursuant to section 39-1-102 (1.6), C.R.S.; and

(b) It is a class 5 felony if the person trespasses on premises so classified as agricultural land with the intent to commit a felony thereon.

Third degree trespass is the simplest of all of them in Colorado. If you unlawfully enter or remain on the premises of any other person it’s trespassing. The end.

Admittedly, this is not much of an offense since third degree criminal trespass is merely a petty offense in Colorado, not even a misdemeanor, but it can be a misdemeanor if you do so on agricultural land.

As with the previous section trespassing on any agricultural land with the intent to commit a felony upgrades the penalty schedule to felony-level. Colorado is awfully serious about behavior on agricultural land, apparently.

How to Obtain a Trespassing Order in Colorado

If you want to file a notice of no trespass against someone in Colorado, you’ll need to notify them verbally or, preferably, in writing via certified or registered letter. If you’re sending a letter, make sure you get a delivery confirmation for it. If the trespassing charges are in relation to some other crime, the police might be able to notify for you.

Once that is done, head down to your local district attorney, sheriff, or police department to get the requisite forms and then fill them out and file them according to requirements. These vary from state to state, but in most states, they do need to be renewed periodically, usually every 6 months or once a year, so be aware of that.

Rules for Posting No-Trespassing Signs in Colorado

Colorado has no specific statewide law pertaining to posting requirements, but many municipalities do. In all cases, you are advised to check your local laws, but generally a large, highly visible sign that is conspicuously posted at all known entryways to your property, and periodically along the perimeter in the case of a larger parcel, is sufficient.

Note that state law doesn’t specify that posting is necessary in order to have the force of law protecting you against trespassers!


Colorado trespassing laws are simple and easy to understand for anyone. Their plain language and broad definitions means there be very little in the way of misunderstanding or weaseling out of a trespassing charge.

On the flip side of the coin, however, that same broad language can easily be misconstrued against you if a landowner wants to stick it to you.

Make sure you pay close attention to where you were going in Colorado, especially when you’re out hiking or involved in other rambling pursuits in nature.

Colorado trespassing laws Pinterest image

9 thoughts on “Colorado Trespassing Laws: What You Need to Know”

  1. Can this be applied to a “code enforcement” jackass who looks over a 6 foot solid wood fence, into a totally enclosed back yard, and cites me for “outdoor storage of junk and rubbish? None of the items in my back yard are junk. We have been fighting the City of Lakewood, CO for almost 3 years now. We have Private Property signs on the fences. Since March 2019, I have spent $5000 for attorneys – a hardship for me, and it looks like I will have to spend more because they are citing me again. The judge closed the case in April 2021, but the code jackass apparently came back in June 2021, and the crap has started all over again. Please pardon my french – this has been a nightmare. I am an 81-year-old woman who has owned my property since 1977. I just want to be left alone. I would greatly appreciate your thoughts and any help on this. They’re citing me again this week. Sorry this is so long. This is extremely upsetting for me.

    1. Hi Carol, sorry to hear of your plight, have similar issue in Douglas Cnty, has been going on for a Decade+. We have current cases in Federal court 20CV03318 and Colo Court of appeals 21CA671, lets say it is not going well for the county, court of appeals, and the Judge. 18th District Court Judge Jeffery Holmes, at trial deliberately turned off the working, For The Record (FTR) system for 2 of the 3 hours. Two County Attorneys assigned to fumbled case 20CV30437 Meghan Taggart#47797, and Dawn Johnson#48451 were let go in December of 2021, Johnson is now at Arapahoe Co. DC sheriff Tony Spurlock, is covering for Holmes, County attorney Lance Ingalls, via CORA he will not release the court room security video, this would show switch being flipped by Holmes. Similarity Colo Supreme court (22SC90) and Appeals Court are covering for Holmes, they will not force District Court to direct Sheriff to release the security video to supplement the appeals record. We are looking for others in your position pls reply.

  2. What if you are a truck driver and you have a bill of lading that shows you are making a delivery at a certain Warehouse and you into the Warehouse property after hours (not knowing it’s after hours) and you are accosted by security as though you are a trespasser even though you show them your documents? Can you be arrested?

  3. What if I get in fight/ disagreement with my significant other and they ask me to leave. I leave, come back the next day do get my belongings and the police are called after I leave, no warrant and I am charged with Felony trespassing

  4. In regards to trespassing on private property…. We have kids in the neighborhood ages 9-12 who we have repeatedly told to stay out of our yard/stay off of driveway including up to our garage/stay off of our front porch area in the front of our home/to stay away from our son’s vehicle parked in front of home/stay away from friends’ vehicles who come over to visit.. We do not have a fence around the front of our home due to not sure our subdivision will let us do that. The parents’ are of course NO where to be seen and we are not sure who these kids belong to at this point (4-8 kids) and not sure if they are on our street…could be from another street. We do have cameras and for right now we are making sure to have video proof and to once again tell them to stay away from property, but not sure if trespassing laws can be enforced/police called to stop these issues.
    We just need some guidance on the matter…

  5. A neighbor has legal access to a well on our property. Does he have to ask where he puts the ditch going to the well for his water line? He has no idea where we’re going to build our house or any other structures. We did not give him any permission to dig the ditch anywhere on our property and he did not ask. We are in no way, shape or form, saying he doesn’t have the right to the well. We are saying he should’ve asked. Can we charge him trespassing fees since the time he put his water line in across property? How much would those trespassing fees be per day?
    Thank you

  6. About a year ago a neighbor bought 52 acres of agricultural land and has an access easement for irrigation, utilities and to her private residence. Our property butts up against the easement and we’ve used it for 30 years to farm and access our irrigation shut on/off valve. She stated that she owns that easement (which she does) and wants us to quit using it Aladdin build our own access easement road on our property. There are no “Private Property” signs but building another road is expensive. Do I have any ground to stand on in trying to fight this and how does “adverse possession” fit in? I really don’t want a huge lawsuit… but want to know my rights.

  7. I’ve lived in a two story four unit apartment for three years. a year ago a racist moved into a n apartment just south of ours. For months I’ve been the target of his racism and escalating criminality. Recently the police declined to arrest him, nor issue a summons, for trespassing, not even with eye witnesses. They advised that this person is on or in the “common” areas of the apartment. Yet, the “common” areas are part and parcel to the totality of the private property, meaning none of the areas are public spaces. So why won’t the police take affirmative action!?

Leave a Comment

Your email address will not be published. Required fields are marked *