Abstract: A spa pool cover lifter and a spa pool including a spa pool cover lifter are disclosed. The spa pool cover lifter may include a first arm pivotally attached to a first section of an articulated spa pool cover and a second arm pivotally attached to a second section of the articulated spa pool cover. The first and second arms may be configured such that rotation of the first arm causes the first and second sections of the spa pool cover to fold together. An actuator and controller is disclosed. A mechanical linkage between the actuator and first arm is disclosed. The mechanical linkage may be an over-rotation linkage.