Trilogy is a residential area in Corona. Corona is a city in Riverside County, California, United States. The cities of Norco and Riverside lie to the northeast, Eastvale to the north, Chino Hills to the northwest, Yorba Linda, and the Cleveland National Forest and the Santa Ana Mountains to the southwest. Unincorporated areas of Riverside County line all of its other borders.
Temescal Valley, California is an unincorporated but census-designated area in Riverside County at the southernmost end of Corona city limits, and is included in the city’s sphere of influence. It includes the neighborhoods of Sycamore Creek, Trilogy, The Retreat and Horsethief Canyon Ranch.
The city of Corona is a part of the Corona-Norco Unified School District. There are eight high schools in Corona: Corona, Centennial, Lee V. Pollard (formerly Buena Vista), Orange Grove, Santiago, Norco, John F. Kennedy Middle College High School and Eleanor Roosevelt High School. There are seven middle schools in Corona: Auburndale, Citrus Hills, Corona Fundamental, El Cerrito, Raney, Norco, and River Heights. There are also 31 elementary schools in the city.