Architect Barton Ross leads a walking tour of Montclair’s Business District, an award-winning Great American Main Street. Learn about the downtown’s past, present, and future on this 2-hour walking tour. Seeking AIA CEU and AICP CM credits. Register at mail@montclairhistorical.org or by phone at 973-744-1796. $10/person. Starting location given at registration. www.montclairhistory.org.