In a saucepan, add the sugar and water. Heat until the sugar dissolves. Chill until ready to use.
In a small pitcher, mix together the lemon juice and chilled simple syrup. Add the syrup in stages and taste so it is the right amount of sweet and sour for your liking.
To serve, place ice cubes in a high ball glass. Add a few mint leaves. Pour some bourbon into the glass to your taste. Add lemonade and top with club soda.