Alta Loma, Rancho Cucamonga, California
（重定向自Alta Loma）
![Snow-capped San Gabriel Mountains above Alta Loma as seen from Sapphire Street and Thoroughbred Street.](/Images/godic/202412/20/San_Gabriel_Mountains3515.JPG")
![Cucamonga Peak looms over Alta Loma which lies along the foothills of the Southern face of the San Gabriel Mountains](/Images/godic/202412/20/Cucamonga_Peak_West3515.JPG")
![Burned area of Cucamonga Canyon, near water basin, at western end of Banyan Street in Alta Loma. San Bernardino County unincorporated land. Grand Prix Fire, 25 October 2003.](/Images/godic/202412/20/Rancho_Cucamonga_burned_area3515.jpg")
![P-40 Warhawk like those flown by the Flying Tigers](/Images/godic/202412/20/Curtiss_P-40E_Warhawk_USAF3515.jpg")
Alta Loma is one of three formerly unincorporated areas that became part of the city of Rancho Cucamonga, California, United States in 1977. The community is located at 34°09′N 117°36′W / 34.15°N 117.60°W in the foothills of the south face of the San Gabriel Mountain range, near Cucamonga Peak and Mount San Antonio (Mount Baldy). Its ZIP codes are 91701 and 91737. Elevation ranges from 1,400 feet (430 m) to 3,000 feet (910 m). The name comes from the Spanish words for "high hill." Alta Loma had previously been known as "Iamosa".