http://www.welcometoharlem.com/page/central_harlem_history/;jsessionid=d8e128o00cg?ct=cdisplay&nt=true&cd_v=dispclean&cd_p=-1&cd_eid=38068 "Central Harlem History" at welcometoharlem.com, 12/30/05] It runs the full length of the block between 116th and 117th Streets along Adam Clayton Powell Jr. Boulevard, with a depth of 175 feet on the side streets.