MO Missouri Porch

Land Use & Property Rights

Trespass & letting people on

Two ideas decide most of this: when keeping people off becomes a crime someone can be charged with, and what happens when you welcome people on. The second one trips up rural landowners the most — so we'll spend the most time there.

The two degrees

Trespass comes in two degrees

Missouri law splits trespass into two levels. The difference mostly comes down to whether the land was enclosed, posted, or whether the person was already told to leave.

First-degree trespass (RSMo 569.140)
Knowingly entering or staying on land that is fenced or otherwise enclosed, posted against trespass, or after you've been told to leave — a class B misdemeanor.
Second-degree trespass (RSMo 569.150)
Entering unposted land without permission — an infraction (a lesser violation), but still trespass.

What posting actually does

Posting supports a case — it doesn't create one

Posting does not magically 'make trespass enforceable,' and unposted land is NOT automatically open — entering without permission can still be trespass. What posting does is support a first-degree case by giving clear notice. You can clearly forbid entry with signs, fencing, purple paint, or telling someone directly.

Purple paint

Purple marks legally mean "no trespassing"

Missouri's purple-paint law (RSMo 569.145): vertical purple marks at least 8 inches long, with the bottom 3 to 5 feet above the ground, no more than 100 feet apart (or marked fence posts with their own dimensions and spacing), legally mean 'no trespassing.' If you're out hiking or hunting and you see purple marks on trees or posts, stay out.

If you're out on the Hunting or Foraging hubs' kind of trips and you see purple marks on trees or posts, treat it the same as a sign: stay out.

Read this before you open your land

The Recreational Use Act is NOT blanket immunity

Letting people onto your land for free — the Recreational Use Act (RSMo 537.345–537.348) — is NOT blanket immunity, and this is the misunderstanding that gets rural landowners hurt. The Act CAN limit your duty when people come onto your land WITHOUT CHARGE for recreation. But section 537.348 says the Act does NOT limit liability in several big situations. Most important for rural Missouri: the 'residential area' exception is defined to include 'any land used for farming or agricultural purposes' — so a working farm or ag land may fall OUTSIDE the Act's protection entirely. Before you open your land, lease hunting rights, charge anyone anything, or rely on a waiver, have a Missouri attorney and your insurer review the arrangement.

The Act does NOT limit liability in these situations:

  • Malicious or grossly negligent failure to guard or warn against a dangerous condition — or negligent failure to warn of an ultrahazardous condition.
  • Injury to someone who paid a charge to enter.
  • Injuries in or on any swimming pool.
  • Injuries on a 'residential area' — which is defined to include land where housing predominates AND any land used for farming or agricultural purposes.
  • Injuries on 'noncovered land' — surface used mainly for commercial, industrial, mining, or manufacturing (though agricultural, grazing, forestry, conservation, natural-area, and the owner's own recreational uses are NOT treated as commercial).

Keep going

Related corners of the hub

Fences and the "fence in" rule live in the fences, livestock & trees page, and the big picture of which rights you actually hold is in the orientation. The wider Land Use & Property Rights hub ties it all together.

Not legal advice

Missouri Porch explains the rules in plain words; your deed, your county, and the statutes are the final word — and for your situation, talk to a pro.

Last checked: 2026-06-18. Property law is nuanced, varies by county, and changes — so treat this as a plain-English starting point, not the final word. The authoritative answers are in your deed and the chain of title, your county's records, and the current statutes; for your situation, talk to a pro.

This is general information, not legal advice. Rules vary by county and change. Check your deed, your county's Recorder and Assessor, and the current statute — and for your situation, talk to a Missouri real estate attorney, a licensed land surveyor, or a title company.

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