Six boy’s lacrosse organizations formed SEPYLA in 1987 to encourage the growth of the sport at the youth level and ultimately to develop stronger high school programs in the greater Philadelphia region.

Today, almost 30 years later, SEPYLA has over nearly 40 member organizations and has spawned youth leagues in Chester County, Lehigh County and New Jersey. The high school programs with players from SEPYLA’s members rank among the most competitive in the nation.

Since its inception, SEPYLA has focused on the creation of community-based programs generally consistent with school district boundaries. SEPYLA has and continues to believe that teams will only improve if they play the best competition available. Consequently, SEPYLA’s rules encouraged members to field teams in its most competitive divisions and discouraged players from playing outside their community in order to provide a competitive schedule for its member organizations and ultimately spread and improve our great game. At the same time, however, SEPYLA recognizes that unique circumstances sometimes warrant exceptions if such circumstances creates an opportunity to play lacrosse where one would not otherwise exist.​