Sunland-Tujunga is a Los Angeles city neighborhood within the Crescenta Valley and Verdugo Mountains. Sunland and Tujunga began as separate settlements and today are linked through a single police station, branch library, neighborhood council, chamber of commerce, city council district, and high school. The merging of these communities under a hyphenated name goes back as far as 1928. Sunland-Tujunga contains the highest point of the city, Mount Lukens.

The Crescenta Valley is a small inland valley in Los Angeles County, California, lying between the San Gabriel Mountains on the northeast and the Verdugo Mountains and San Rafael Hills on the southwest. It opens into the San Fernando Valley at the northwest and the San Gabriel Valley at the southeast. It is nearly bisected by the Verdugo Wash, a smaller valley separating the Verdugo Mountains from the San Rafael Hills. Most of the valley lies at an elevation of over 1,500 feet.