A sliding door latching and locking system is disclosed which includes a latch assembly, a lift rod assembly, and a retainer assembly, among other things. In some embodiments, the latch assembly includes a support member mounted in a movable body and a latching arm pivotally mounted to the support member having a distal end thereof extending outside of the periphery of the movable body, wherein the distal end includes an engagement facilitating portion with a sloped outer surface for contacting an interlocking member.