Perhaps you could exchange it for a property of equal value in California.

If it is, by any chance, suitable for a winery and vineyard, I think you would find Californians with an intrest in it.

There must be a California agricultural newspaper. The one in Oregon is called The Capital Press. I don't know what the California one is called, but it would be possible to find it with google. That is one possibility of a place to advertise.

Sothby's has a real estate agency in the USA that specializes in luxury properties. I suggest that you contact them and see if they have any customers that might like to exchange properties with you..