In a large pot over high heat, combine the water and granulated sugar. Cook for 3 to 5 minutes, stirring occasionally, until the sugar is completely dissolved.
Remove from the heat. Stir in the cranberry juice, orange juice, and frozen lemonade concentrate until the concentrate melts. You should have about 4 quarts of liquid.
Let the mixture cool completely. Pour it into a large freezer-safe container with a tight lid and freeze overnight, or for at least 8 hours.