A lockable bicycle rack system includes a mounting clip and a rack configured to detachably couple to a bicycle frame. The rack includes a body, a lid pivotally coupled to the body between an open position and a closed position, and a locking mechanism. The mounting clip is coupled to the rack and includes a base component adapted to couple to a container, a rack receiving gap, and a lever arm having a rack latch that extends at least partially across the rack receiving gap when the lever arm is in a locked position. A side member of the body extends through and is locked within the rack receiving gap when the rack latch is in the locked position, and a side member of the lid prevents the lever arm from leaving the locked position when the lid is in the closed position.