I live on a forested hillside, so in my yard there are trees of maybe 90-100 feet, including some mature maples, oaks and larch. In the immediate area are trees much larger, as the area I live in has been a forest preserve since the early 1800's, so there are some significantly huge old growth in there. I guess 2oo feet or more, but that is guess. They are too far back to be an impact on my place, so I just enjoy the view.