Place the sliced peaches into a large pitcher, feeling the juicy flesh and fragrant aroma fill the air.
Add granulated sugar over the peaches and gently muddle with a muddler or the back of a spoon until the peaches release their juices and the sugar begins to dissolve.
Pour in the freshly brewed, chilled black tea, watching the mixture turn a warm, amber hue as the tea mingles with the fruit and sugar.
Stir in the bourbon and squeeze in the fresh lemon juice, releasing a bright, citrusy aroma that complements the smoky bourbon and sweet peaches.
Fill the pitcher with plenty of large ice cubes, listening for the satisfying clink as they settle into the liquid and chill the drink thoroughly.
Give everything a good stir to ensure the flavors meld and the ice cools the mixture evenly.
Pour the chilled peach bourbon iced tea into glasses, making sure to include some fruit slices in each.
Garnish with additional peach slices or a sprig of mint if desired, and serve immediately for a bright, summery refreshment.