Preheat your oven to 350°F (175°C).
In a large bowl, combine sliced peaches, granulated sugar, and lemon juice. Toss until well mixed.
Transfer the peach mixture to a greased baking dish.
In another bowl, mix rolled oats, flour, brown sugar, cinnamon, and salt.
Pour melted butter into the oat mixture and stir until crumbly.
Spread the oat mixture evenly over the peaches.
Bake in the preheated oven for 30 minutes, or until the topping is golden brown.
Remove from the oven and let cool for 10 minutes.
Serve warm, optionally with ice cream or whipped cream.
Enjoy your delicious peach crisp!