Please check the club website for details
http://www.mnbrewers.com/events/event/2016-big-brew-day/
 
then go to North Loop BrewCo on Facebook (go to the Event page) to register your intent to participate in the event.
https://www.facebook.com/events/1129354690429066/
 
This year the club will be awarding prizes at the September Iron Brewer meeting for the two best beers that adhere to the American Homebrewer Association's suggested Big Brew recipes: an Alt and a Ginger Ale.
http://www.homebrewersassociation.org/aha-events/national-homebrew-day/#Recipe