I have a friend who lives about 50 miles away, at the foot of the mountain. On a tip from her wiser friend, she piled everything left from canning peaches in a heap in the garden. That means not only skins but peach pits and cut-out bad spots. The next spring, they started seeing little trees come up. They've been giving them away to friends as they appear, so it never gets overcrowded.
We are in zone 4-5. As to what kind of trees they will become and what kind of peaches they will produce, no one knows yet. It's only been two years. But any peach is better than no peaches!