Pala Mesa, California

The Lilac Fire was a fire that burned in northern San Diego County, California, United States, and the second-costliest one of multiple wildfires that erupted in Southern California in December 2017. The fire was first reported on December 7, 2017, burned 4,100 acres (1,659 ha), and destroyed 157 structures, before it was fully contained on December 16. The fire cost at least $8.9 million (2018 USD), including $5 million in firefighting expenses and property damage, and an additional $3.9 million in cleanup and erosion control costs. The fire threatened the communities of Bonsall, Oceanside, Vista, Fallbrook, and Camp Pendleton. During the fire, an estimated 10,000 residents were forced to evacuate, while a total of over 100,000 residents were forced to or advised to evacuate. On December 7, the Lilac Fire also cut the power to 20,000 people.

Rancho Monserate was a 13,323-acre (53.92 km2) Mexican land grant in present-day San Diego County, California given in 1846 by Governor Pío Pico to Ysidro María Alvarado. The grant extended south and east of the present day Fallbrook down to the San Luis Rey River. The grant was bounded on the west by Pico's Rancho Santa Margarita y Las Flores.

The Lilac Road Bridge is a reinforced concrete arch bridge in Bonsall, California, built in 1978 at a cost of $1,500,000. Its main span is 455 feet (139 m), with a total length of 745 feet (227 m). It was designed by Fred G. Michaels and John Suwada, with architecture consulting by William Wells. This bridge is one of the two overcrossings in San Diego County with this unique arch design, the other being the Eastgate Mall Bridge. When traveling northbound on I-15 it is the noticeably high bridge before the SR 76 exit.

Bonsall is a census-designated place (CDP) in San Diego County, California. The population was 3,982 at the 2010 census, up from 3,401 at the 2000 census. The Bonsall area was heavily affected by the Lilac Fire in December 2017, which burned 4,100 acres.

Rainbow is a census designated place (CDP) in northern San Diego County in the U.S. state of California. The population was 1,832 at the 2010 census, down from 2,026 at the 2000 census.

Fallbrook is a census-designated place in northern San Diego County, California. Fallbrook had a population of 32,267 at the 2020 census.Fallbrook is immediately east of the U.S. Marine Corps' Camp Pendleton. Fallbrook is known for its avocado groves and calls itself the "Avocado Capital of the World".

Rainbow Valley is a small valley in Riverside County and San Diego County in the U.S. state of California. It is the site of the settlement named Rainbow. The area was previously known as Vallecitos ("little valley") and was renamed Rainbow Valley in the late 1880s after James Peebles Marshall Rainbow, who bought a homestead there.

California's 49th congressional district is a congressional district in the U.S. state of California. The district is represented by Mike Levin. The district currently covers the northern coastal areas of San Diego County, including Oceanside, Vista, Carlsbad, and Encinitas, as well as a portion of southern Orange County, including San Clemente, Dana Point, San Juan Capistrano, Ladera Ranch, and Coto de Caza. Marine Corps Base Camp Pendleton is in the district. In the 2016 election, Darrell Issa won by a margin of less than 1%. In the 2018 election, this district was considered to be a major battleground. Rep. Issa announced that he would not seek reelection. Following the November 6, 2018 election, Democrat Mike Levin became the district's congressman.

Margarita Lookout, also known as Santa Margarita Lookout, is a lookout point in the Santa Margarita Mountains, part of the larger Santa Ana Mountains in San Diego County, California. The original fire lookout tower, built in 1935 by the CCC, was later replaced by a new lookout tower and cabin in 1965. In 1986, the tower and cabin were both burned in a wildfire. In 1988, the burnt tower was destroyed in a collision with a Marine Corps CH-46E helicopter. The lookout tower was badly damaged as a result and was promptly removed. Only a concrete foundation remains today, however the site is still accessible via trail (Margarita Road/Truck Trail). The lookout is approximately one mile north of Margarita Peak, and is located in the Cleveland National Forest.

Hidden Meadows is a census-designated place (CDP) near Escondido in San Diego County, California. The population was 3,485 at the 2010 census, up from 3,463 at the 2000 census.

The San Marcos Mountains are a mountain range in northwestern San Diego County, Southern California.They are a small range of the Peninsular Ranges System. Native undeveloped habitats of the San Marcos Mountains are in the California chaparral and woodlands ecoregion.

The Merriam Mountains are geologically composed primarily of igneous rocks formed during the Mid-Cretaceous period which began 145 Million years ago and ended 66 million years ago. The Merriam Mountain Range is home to coyotes, rabbits, rattlesnakes and a variety of common insect species. Fennel, an imported plant species native to Italy, can be found growing on some areas of the southern range.The Merriam Mountains are a mountain range in San Diego County, California.