Abstract: A cargo bay cover for a pickup truck includes at least first and second panels hingedly connected to each other. The first panel includes a release mechanism including a lever arm that is movable between a released position and an unreleased position, and a lock that is movable to a locked position preventing movement of the lever arm. The cover includes a resiliently deformable panel latch that is released when the first panel is opened and that is capable of flexing around a keeper if the cover is opened incorrectly. The cover includes a unique mounting clamp for attachment to the pickup truck. A second half of the mounting clamp rides up a shoulder on a first half of the mounting clamp as the halves are drawn together, enabling the to pinch in two directions—one parallel to the drawing force and another perpendicular to the drawing force.