Agree. Property line disputes are incredibly nuanced and can be complicated depending on the state. I have no idea about CO. Here in WA it's 10 years plus it has to be obvious and some other qualifiers.
Our friend had 45 acres stolen from them over a survey mistake in 1827 despite multiple surveys since and the plaintiff in the case posting both side of the existing line for decades first when they leased our friend’s property and then again when they bought the farm next door. Also conveniently they no longer had any maps showing the lines despite multiple people saying they existed before the lawsuit. It’s the most ridiculous case I’ve heard as one line was moved and the judge ruled against our friend who had to give up 45 acres but turned around and ruled in favor of the several smaller properties because they would lose their clean and green status resulting in significant back taxes.
Here in PA that’s about $250,000 worth of dirt and they tried to get 100 acres but only got a bit less than half.
It’s really a fairly simple solution.
Don’t hunt fence lines.
Except it’s not that simple at all, animals don’t read boundary lines and sometimes the best place to hunt at that moment is on the line.