Giswald's Big Holiday Ale that RR offers every year. Holiday Ale is session beer brewed with cinnamon, coriander, ginger, clove and orange peel. Look for it in RedRock's 500ml bottles. 4.0% ABV.
RedRock has a deal with Harmon's Grocery stores to sell their beer. I'm not sure yet if this beer will also be exclusive to Harmon's. We'll let you know.