O'Fallon Brewery | St. Louis, MO Beer Brewery O'Fallon Brewery, Microbrewery, O'Fallon Gold, O'Fallon Wheat, Wheach, 5-Day IPA, WE LOVE BEER, Brewery At O’Fallon Brewery, 45 Progress Parkway in Maryland Heights, we are passionate about making great beer. We work hard to brew beers that deliver unique flavor and refreshment. Ours is a small craft brewery located just north and west of St. Louis, Missouri. The brewery was founded in January 2000, and has experienced steady growth for the last 16 years.