WILA was formed at the beginning of the 2010–2011 academic year in order to name a champion (which does not involve a tournament), players of the week, and an all-league team at the end of the season.

The WILA is a loose confederation that not only assures games for its members, but also hopes to act as a catalyst for other NCAA Division II institutions looking to make a move to varsity lacrosse and eyeing stability.

[2] The 2010–2011 season included Adams State, Fort Lewis, Colorado Mesa and Regis competing in women's lacrosse, while Adams State, Dominican, Grand Canyon, Colorado Mesa and Notre Dame de Namur competed in men's lacrosse.

[9] The season saw additional membership changes when Lindenwood announced its men's program would join the new ECAC Division II Lacrosse League starting in the 2012–2013 academic year.

[11] Men's lacrosse was added as an official Rocky Mountain Athletic Conference sport starting in the 2015–2016 school year, essentially absorbing the WILA.