The Oark General Store. Call Us: 479.292.3351 Hours: Wednesday-Monday 8-4 CLOSED Tuesday. Oldest continuous-operation store in Arkansas, established in 1890. The building has the original floors, walls, and ceiling. Inventory includes groceries,Established in 1890, it’s the oldest continuous-operation store in Arkansas. People drive for miles to eat the home cooking - breakfast, lunch and dinner.