Dennis M wrote:
Let's say I have two large trees in my backyard that are about 61"
apart and 69" and 59" in diameter. Unfortunately there is no branch
for a swing in the perfect place higher up between them, in fact the
lowest branch is on the other side on one of the trees, and it's
about 20 feet high (I don't think my ladder could reach it even if I
wanted to).

Is there some way to affix a rope, maybe about 15 feet high, between
the two trees so I can string a swing from it? What's the best way to
do this without harming the trees and not have it slowly slip down? I
thought this might make a neat summer project. Thanks.

If it was me, I would get a stout section of metal pipe, maybe 2" or so, and
hang it up in each tree (affix each end of the pipe with some rope,
replacing the rope every few years). From the metal pipe strung up high
between the two trees, you will have a location from which to attach your
swings - you always want at least two swings, as swinging is more fun with a
partner.

Jon