Brimfield Antiques Show Brimfield, Massachusetts is the site of the largest outdoor antique show in New England, with over 5000 dealers from all over the country. The shows are all located within a one mile stretch on both sides of Route 20.

The Brimfield shows operate three times a year during May, July and September and are open for a six day period begining on a Tuesday and ending on a Sunday. Some operators open all days while others choose to open for just a few days during this period.