In a medium saucepan, combine 1 cup of granulated sugar and 1 cup of water. Heat over medium, stirring until the sugar completely dissolves, about 3-4 minutes.

Once dissolved, add 2 cups of fresh blueberries, then bring the mixture to a boil.

Reduce the heat to low and let the blueberry mixture simmer for 3-4 minutes.

Remove from heat and pour the mixture through a fine sieve into a bowl or jar to strain the syrup.

In a large pitcher, combine the cooled blueberry syrup with 1 cup of freshly squeezed lemon juice and 5 cups of cold water.

Cover the pitcher and place it in the refrigerator for at least 30 minutes.

When ready to serve, fill glasses with ice cubes and pour the chilled blueberry lemonade over the top, garnishing with additional blueberries or lemon.