Stay away from the towers! and Guy wires. It could be a shocking experiene!!
Those are transmission line's and GNT's purchase there R,O,W's from Land owners. Probably private property, But if the Power Company does not have sign's and the property owners have not posted it. I would say you are okay to ride, what looks to be a well established trail. I followed the lines from Sub to Sub but did not see the nearest generation plant or peaking facility, so I couldn't tell who they belong to
Ride Your Own Ride