I put in a treehouse and would love to get power to it, but my property is very rocky. Buring the wire is just not practical as digging a trench would require equipment that can get through rock on a very uneven surface.

Is there a practical way to keep the wire above ground?

I put in a treehouse and would love to get power to it, but my property is very rocky. Burying the wire is just not practical as digging a trench would require equipment that can get through rock on a very uneven surface.

Is there a practical way to keep the wire above ground?

EDIT based on comments.

I'm in Westchester County, NY. The treehouse is 20-25 yards from the house, downhill.
only need one socket and maybe 2 lights in the treehouse. Enough to charge some ipads when my kids what to hang in there. Ideally, it lasts maybe 10 years? The treehouse is solidly built.