I have been to Duluth many times. I have not bought at a single liquor store in town, but I know of at least 1 place in town that has has their own brews on tap. When I go there to explore the city, I always do lunch at Fitgers Brewery, north side of town, about 1/4-mile north of St. Mary's hospital, I believe.....it turns into London Road as it exits the city limits, I think, next to Pickwick. They always have a list of their own brews on tap, and I have always been pleased. Nothing like tipping a couple pints in support of one of the local breweries then going store hopping with a little shine on the face. Not sure if they sell their brew in bottles or growlers or not.
Dry Hoppin' Mad,