Montecito Heights' boundaries are roughly the
Pasadena Freeway (
SR 110) or the
Arroyo Seco on the northwest, Pasadena Avenue on the west, Avenue 35 to the south, Huntington Drive to the southeast, and Monterey Road to the east. Neighboring districts include
Monterey Hills on the northeast,
El Sereno on the southeast,
Lincoln Heights on the southwest,
Mount Washington on the northwest, and
Highland Park on the north. Owing to the rugged terrain, no major thoroughfares run through the area, besides
Griffin Avenue (Los Angeles). The district is largely in
ZIP code 90031. Most of the homes on the hills were built after the 1950s when engineering technology enabled builders to construct on the steep hillsides. ==Neighborhood==