This summer I ran a main line wire 400ft at the bottom of the ravine. It followed the ravine down to my sap shack and had enough turns that doing one line was quite difficult. If I had to do it again I would have run several wires along each straight section to avoid having to tension one wire through multiple turns.
2019 - 150 taps 3/16 shurflo, Deer Run 125 hobby RO
2018 - 120 taps 3/16 hybrid (shurflo), 2x6 raised flue w/hood, homemade arch w/ AUF & AOF - 34.5 gallons
2017 - 60 taps 3/16 gravity, oil tank arck w/ steam pans - 12.5 gallons