Luckily, freezing peaches is as easy as 1-2-3:
1. Prepare the peaches for freezing by peeling and slicing them. If you just have a few peaches, see How to Slice Peaches for an easy way to slice then peel the peaches; if you're working with 4 or more peaches, I suggest peeling then slicing as shown in How to Peel Whole Peaches.
2. Lay the peeled peach slices in a single layer on a baking sheet. If you want to minimize clean-up, go ahead and line the baking sheet with parchment paper or wax paper first.
3. Set the baking sheet in a freezer until peaches are frozen through, at least four hours and up to overnight. Transfer the frozen peach slices to a resealable plastic bag, seal - pushing out as much air as possible; return the peaches to the freezer until you're ready to use them. Frozen peaches will keep up to 6 months in a refrigerator-freezer combo and up to 12 months in a stand-alone freezer.
Use frozen peaches in baked goods or smoothies to add tart sweetness once fabulous peach season is but a memory.