A bleacher seating system provides a seatback locking and release mechanism that allows for rapid simultaneous repositioning of the seat back portions in each row of seating to aid in setting up and collapsing sets of seating rows. The locking and release mechanism may be actuated to substantially simultaneously unlock all seat back portions in a row from a single location. The bleacher seating system may be readily set up or collapsed by a single operator, such as by manually or remotely unlocking and locking the seat back portions in rows so that the seat backs may be pivoted between raised and lowered positions. Optionally, deck nosemount clamps allow for increased walking space behind the seats and a particularly compact seating storage configuration.