Posting No Trespassing Signs in Kentucky: Placement and Purple Paint

To post your property against trespassers in Kentucky, you have two legally recognized options: hang no-trespassing signs in a conspicuous manner, or mark your boundary lines with purple paint that meets the state’s size and spacing rules. Both satisfy the notice requirement under KRS 511.090 and KRS 511.070, and the rules for posting no trespassing signs in Kentucky focus on visibility rather than any specific sign design.¹²

What Kentucky Requires of a Posted Sign

Kentucky law does not dictate a size, color, or wording for no-trespassing signs. The statute says only that the property must be posted “in a conspicuous manner.”¹ What matters is whether a reasonable person approaching your property would see the notice and understand that entry is not allowed. A weathered sign nailed to the back of a tree does not meet that standard. A clearly lettered sign at eye level on the approach side of a boundary tree does.

Posting is especially important on rural or wooded land. Under KRS 511.090, if your property is unimproved and apparently unused, and it is not fenced or otherwise enclosed, someone who walks onto it has not committed criminal trespass unless you gave notice, either by posting the land or by personally telling them to stay off.¹ Without signs or paint, you may have no legal basis to pursue a trespass claim against someone who wanders onto unenclosed acreage.

Where and How to Place Your Signs

Because the statute measures notice by visibility, placement decides whether your signs hold up. Put one at every likely entry point: gates, driveways, trailheads, and any gap in fencing where people tend to cross. On fenced or walled property, attach signs directly to those structures at regular intervals. On open or wooded land without a fence, space signs along the boundary close enough that someone walking the perimeter would see at least one before crossing in.

Mount signs at roughly eye level and keep them clear of brush, fallen branches, and anything else that might block the view. Reflective or brightly colored signs with large lettering are the safest choice, especially on wooded property where natural cover can quickly swallow a small sign. Check your posting before hunting season each fall and replace anything faded or damaged.

Marking Boundaries With Purple Paint

Since 2022, Kentucky property owners have been able to mark boundaries with purple paint instead of, or in addition to, signs. Under KRS 511.070, paint marks that meet the statute’s specifications are treated as legally equivalent to fencing or enclosure for purposes of second-degree criminal trespass.² Paint costs less than signs over time, cannot be pulled down, and weathers better.

Each mark has to meet three requirements:

Vertical lines at least eight inches long and at least one inch wide.
The bottom of each mark between three and five feet above the ground.
Spacing no more than 100 feet apart on forest land, and no more than 1,000 feet apart on all other land.

The marks must be readily visible to anyone approaching the property.² Paint the side of the tree or post that faces outward, toward where people are likely to approach from. The 100-foot forest spacing keeps marks close enough that someone walking through timber should always have one in sight; the 1,000-foot allowance on open ground gives room to work across pasture or field.

Signs and paint are not mutually exclusive. Many Kentucky landowners use signs at gates, driveways, and road frontage where visitors are most likely to enter, and purple paint along the long wooded stretches of boundary where individual signs would be impractical or easily missed.

If Your Land Borders a Railtrail

KRS 511.090 contains a specific rule for property adjoining railtrails: private land next to a railtrail is presumed to carry notice against trespassing even without signs or fencing, and anyone using the trail is presumed to lack permission to step onto the adjoining land unless the landowner granted it.¹ You already have legal protection there, though posting is still worth doing to head off disputes about who knew what.

Keeping Your Notice Legally Effective

Posting is not a one-and-done task. The conspicuous-manner standard applies at the moment of the alleged trespass, not the day you drove the nail in. Walk your boundary lines once or twice a year and check for signs that have fallen, faded, or been overgrown. Purple paint holds up longer than most signs but still fades and should be refreshed every few years.

Personal notice works too. If you tell someone directly to leave your property, that communication counts as notice under KRS 511.090 for that specific person, whether or not the land is posted.¹ Write down the date and what was said. For someone who keeps coming back, a letter or email telling them not to return creates a record that is harder to dispute later than a verbal warning alone.

1
Justia. Kentucky Code 511.090 – General Provisions
2
Justia. Kentucky Code 511.070 – Criminal Trespass in the Second Degree