Minnesota's precinct caucuses will be held on February 25, 2020 at 7 pm. Precinct caucuses are meetings organized by political parties to endorse candidates and build party platforms prior to general elections. You can find where your local precinct caucus will be held by using the Precinct Finder Tool at mnvotes.org.
The League of Women Voters of Minnesota has created a document that describes the precinct process. A link to the document can be found here.