The Mount Si Lacrosse Club was formed in 2010. The Club is a recognized tax exempt charitable organization under Section 501(c)(3) of the Internal Revenue Code. Mount Si Lacrosse serves 235 boys and girls in grades 2-12 in the Snoqualmie Valley School District. The Boys High School program is a member of the Evergreen Conference of High School Boys Division 2, which also includes Redmond, Union, Liberty, and Overlake. The youth program was also formed in 2010 and played their first year under the Snoqualmie Valley Youth Lacrosse name.