Girl Scout Cookie Season is Here, and You Can Purchase Your Boxes All Around Bismarck and Mandan! Tis the season for GIRL SCOUT COOKIES! In the past, it may have been difficult to know exactly when and where you could find the Girl Scouts were selling the goods. BUT thanks to apps and such, a person can easily find and purchase all the delicious flavors all cookie season long! Click here to learn more about purchasing Girl Scout Cookies here, and you can check out the dates and locations below. When and Where to Purchase Girl Scout Cookies in BISMARCK