Land Use & Property Rights
Trespass & letting people on
Two questions matter most: when keeping people off becomes trespass, and what happens when you let people on.
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 helps a case
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 them like signs: stay out.
Opening your land
The Recreational Use Act has limits
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 pages
Fences and the "fence in" rule live in the fences, livestock & trees page. The big picture of which rights you hold is in the orientation. The Land Use & Property Rights hub ties the pages together.
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