If you see a purple fence post, you need to know what it means
If you encounter a purple fence post, it’s best to steer clear.
A purple fence post serves as a clear message: No trespassing!
While property owners can use signs to mark private property, signs can deteriorate over time. Paint, on the other hand, lasts much longer and effectively conveys the same warning.


Lower Alsace Township, PA – June 22: A painted purple trail blaze on a tree along the side of the trail. In the Neversink Mounatin Preserve in Lower Alsace Township Tuesday afternoon June 22, 2021. (Photo by Ben Hasty/MediaNews Group/Reading Eagle via Getty Images)
In 1987, Arkansas became the first state to implement a purple paint law. Today, 22 states allow landowners to mark their property boundaries with purple paint.
Some states use different colors, such as orange in Idaho and Montana, but the intent remains the same.
Initially, many governments required landowners to use both purple paint and signs. Over time, the need for signage was eliminated. However, if you live in one of the 28 states without a purple paint law, you might not recognize its significance.
A painted post or tree means no trespassing.

In order to comply with the law, the purple stripe must be 3′ to 5′ off the ground and at least 8″ long and 1″ wide. The markings must not be more than 100′ apart.
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