In a small saucepot, combine the sugar, 1 cup of water, and the mint leaves. Bring to a gentle simmer and heat for 10 minutes, stirring occasionally. Strain the syrup into a jar or other container. Discard the mint leaves.
Meanwhile, boil 2 cups of the water. Drop in the tea bags and steep for 5 minutes. Discard the bags.
In in a large pitcher, combine the mint syrup, tea, 6 cups of cold filtered water, the lemon slices, and the berries. Stir. If the tea seems too strong for your taste, add an additional 1-2 cups of water. Cover and chill at least 1 hour.
Serve over ice with additional berries and a sprig or two of mint!
Keyword berries, blackberry, blueberries, drinks, fourth of july, iced tea, july 4th, mint, strawberries, summer, sweet tea, vegan