The marionberry is a cross between the Olallie and Chehalem blackberries exclusively bred at Oregon State University in partnership with the USDA. Since the berry's production started in 1945, the marionberry has become so popular that legislation to make the berry the official state berry is currently in the works. The berry is known for its slight tartness and earthy, yet sweet flavor and since the marionberry doesn't ship well it has become the centerpiece for many Oregon-based delicacies including muffins, ice cream, and jams. But none of those treats can top the marionberry pie.
The easy to grow fruit has become a focal point for pie shops like the Williamette Valley Pie Company in Salem, Oregon who processes approximately twelve million pounds of the berry per year and lets visitors pick their very own marionberry during the summer months of the year. Your average blackberry pie has nothing on Oregon's prized marionberry pie.