Tonneau cover system with automatic stowing latch

A tonneau cover system for a cargo box of a truck, the cargo box having a forward end, the tonneau cover system comprising:

• a tonneau cover including a plurality of sections hingedly coupled together, the plurality of sections including a forward section and a plurality of rearward sections;
• the tonneau cover being foldable between a closed configuration in which the plurality of sections are arranged in a first plane to cover the cargo box and an open configuration in which the plurality of sections are arranged in a stack with the rearward sections stacked upon the forward section;
• at least one pair of cooperating locking elements coupled to the tonneau cover with the cooperating locking elements being positioned to engage and automatically lock with each other when the rearward sections are folded onto the forward section in the stack, the cooperating locking elements retaining the sections together in the stack when locked with each other.