Since 2010, Mount Si High School has fielded a boys team for the growing sport of lacrosse, and since 2015, the school has had a girls team — junior varsity in its first year and a varsity program last spring.
The programs are club sports, open to students in grades 9 to 12.
The boys compete in Division I of the Washington High School Boys Lacrosse Association and the KingCo Conference. Conference opponents include Bellevue, Issaquah, Bothell, Mercer Island and Eastlake.
The girls compete in the Washington Schoolgirls Lacrosse Association, against such opponents as Sammamish West, Holy Names, Seattle Prep and Issaquah.