The ALTA Mixed Doubles League is made up of men and women 18 years of age and older and plays during the Winter and Summer seasons. Each team must have, at a minimum, 6 men and 6 women. Each Mixed season lasts seven weeks ending in a series of playoffs, which lead to the City Championship at each playing level.
Teams are formed through individual effort at public facilities, neighborhood courts, and private clubs. Playing levels include, from advanced to novice, AA, A, B, and C. Within each level, there are up to 9 flights.
Movement within the levels and flights is determined by the winning percentage of the team and previous levels of its players. With so many degrees of competition, players are assured of facing off against someone of comparable ability and allows for a highly competitive match and fun tennis environment.