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A walk in the park needn't be too meandering
(lemmynsfw.com)
Desire paths Desire paths can be paths created as a consequence of erosion caused by human or animal foot-fall or traffic. The paths usually represent the shortest or most easily navigated routes between origins and destinations. https://en.wikipedia.org/wiki/Desire_path
Are they painted? It looks like they're wrapped in something to me, I'd also like to know why. My first thought was to protect against cold or weather.
Painted.
People say it's keep them safe from bugs. I think the link the other person shared sums it up pretty well.