Lacrosse is almost year-round in Illinois. Several club programs have robust summer and fall leagues and there also a handful of indoor programs during the winter months. Additionally, there are lots of tournaments in Illinois, Wisconsin, Ohio and all over the country to which you can travel and ref. If you happen to have a daughter that plays on a travel team, being a US Lacrosse certified official allows you to travel with the team and pick up some games when you're not watching your daughter play.
Check out the Great Lakes Region Calendar for more details as well as the US Lacrosse events page to see a listing of some the many tournaments in which you can officiate.