 The area is seven blocks wide, running from SE Belmont St. 4 blocks north to SE Stark St. and 3 blocks south to SE Salmon St.SE Belmont St. between SE 33rd Ave. and SE 35th Ave., in Sunnyside, is the heart of the district.The area developed around the first trolley line in East Portland, established in 1888 (and converted to a bus line in 1949).