A tonneau cover system includes a cover and a pivot mechanism. The cover includes a plurality of panels hingedly coupled together, and is foldable between an extended configuration and a folded configuration. The pivot mechanism includes a first link bar and a second link bar. The first link bar has an upper end pivotally connected to a forward panel and the second link bar has an upper end pivotally connected to the forward panel. With the cover in the folded configuration, the pivot mechanism may move the stack from an initial stack configuration in which the forward panel is in the first plane to a storage stack configuration in which the forward panel of the cover extends upright along a second plane, and to simultaneously move the forward edge of the forward panel rearwardly and above the first plane.