I have a similar problem with a high rock wall shoreline. I do have a sturdy permanent dock so I used a little Yankee ingenuity to get my lift out of the lake for the winter. I cantelevered two 4x4s off of the dock and pushed the lift as close to the dock as possible. With the lift in the nearly up position, I chained the upper boat lift rails to the 4x4s. Pressing the down button on the lift control pulls the lift bottom up and out of the water. To insure that the lift bottom wouldn't bleed down over the winter, I wrapped some straps around the bottom and top rails. Takes about an hour to get it done. It has worked for 4 winters so far.
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