- Winner of the 1999 Great American Main Street Award by the National Trust For Historic Preservation The San Luis Obispo Downtown Association is a partnership of members working for the Economical, Social, Cultural and Environmental Vitality of Downtown San Luis Obispo. Help The Prado Day Center: Spare Change Fundraiser & Drop-Off Locations Check out the Concerts in the Plaza Line Up for 2002!www.downtownslo.com