The WIAA began sponsoring boys lacrosse with a Tournament Series in 2024. Forty school programs offered the sport in its first season, including 39 eligible to compete for a State championship. The number of tournament-eligible teams increased to 41 in the second year.
One division of tournament play have culminated with a championship game conducted at the Bank of Sun Prairie Stadium at Ashley Field, Sun Prairie, Wis. Middleton was crowned champion of the first tournament with a 7-6 win over Neenah. Waunakee won the title in 2025 with a 9-8 victory over Kettle Moraine/St. John's NW Academies.
The teams that have qualifying for the championship final have been Kettle Moraine/St. John's NW Academies, Middleton, Neenah and Waunakee.