North Seattle Baseball Association serves families within the geographic boundaries of the Lake Washington Ship Canal to the south, 205th Street to the north, Lake Washington to the east, and Puget Sound to the west. Players are sorted according to age into seven divisions, starting with t-ball and finishing with competitive play on a full-size field. The regular season runs March-June, with an All Star or Tournament Baseball competition at the end. Registration for the season begins in January. Supplemental programs designed to enhance player development are also offered periodically, such as the Winter Ball program during January and the Summer Ball (89er ball) program for seven- to nine-year-olds that runs after the end of the season.