Glendora, California

Glendora is a city in the San Gabriel Valley in Los Angeles County, northeast of Downtown Los Angeles. As of the 2020 census, the population of Glendora was 52,558. World-famous Route 66 runs through the city. Like many of its neighbors, Glendora was founded during the Southern California real estate boom of the 1880s.

Known as “The Pride of the Foothills", Glendora is nestled in the foothills of the San Gabriel Mountains. Its downtown area, locally known as the Glendora Village, hosts dozens of restaurants, cafes, shops, and boutiques along Glendora Avenue with many community events scheduled throughout the year.

Neighborhoods and residences in Glendora reflect the city's history and range from Queen Annes, to Folk Victorians, early 20th-century bungalows, to ranch style homes, to mid-rise multi-family residential complexes, to modern mansions. Glendora's most expensive neighborhoods contain many very large, secluded, estate homes with views across the San Gabriel Valley to Downtown Los Angeles and beyond.

Glendora is bordered by Azusa and the unincorporated community of Citrus to the west, San Dimas to the east and south, Covina and the unincorporated community of Charter Oak to the south, and the San Gabriel Mountains, including protected areas within the San Gabriel Mountains National Monument, to the north.

History

Early inhabitants

The first archaeological evidence of human settlement in Glendora dates from . Around 3500 BCE, the Takic people moved into the area. By the time Europeans arrived in present-day Los Angeles County, the Tongva, also known as the Kizh or the Gabrieleños, were the dominant group.

In the foothills and inland areas (such as present-day Glendora), Tongva settlement patterns included both permanent village sites and seasonal camps, usually located near reliable water sources like streams or springs. The nearest villages to modern Glendora were Asuksa-nga (meaning "Skunk-place") along the San Gabriel River in present-day Azusa and Duarte, and Momwamomutn-gna (meaning "Place of many springs") in present-day San Dimas. What is now Glendora was the site of seasonal camps and hunting grounds, particularly near the intermittent streams around Dalton Canyon.

thumb|left|Tongva woman grinding acorns (1900), location unknown Tongva daily life was closely tied to the land's resources. They were primarily hunters and gatherers rather than farmers. The abundant oak woodlands of the San Gabriel foothills provided acorns as a dietary staple; acorns were shelled, ground on stone mortars, and leached to make a nourishing acorn mush. Along rivers and marshes, Tongva people gathered wild seeds such as chia sage, berries, and herbs. In inland communities like the Glendora area, protein came from hunting and trapping local game like deer, rabbits, and birds. Trade with neighboring tribes was well-developed; the Tongva were notable as one of the wealthiest and most influential indigenous groups in Southern California, exchanging goods like steatite (soapstone) bowls, shells, and other items in a far-reaching trade network. This network connected them with peoples as far away as the Yokuts of the Central Valley and the tribes of the Colorado River, illustrating how Tongva economic and cultural influence extended beyond their immediate homeland.

Daily life in a Tongva village was structured around communal and familial activities. Tongva dwellings (called kich or kiiğa) were dome-shaped structures made of willow branches and thatched with tule or other grasses. These homes had a central fire pit and a smoke hole at the top for ventilation. Villages typically ranged from a few dozen to a hundred people, and early Spanish observers noted that each village was politically autonomous under its own chief, yet linked to others by kinship and language. Men and women both had important economic roles: men often did most of the hunting and fishing, while women were expert foragers and skilled in processing plant foods and weaving baskets. Both sexes wore their hair long and adorned their bodies with tattoos and paint. Clothing was minimal in the warm Southern California climate—men often wore little more than a breechcloth, and women wore skirts made of deer hide or woven fiber. In cooler weather, they draped themselves in capes or cloaks made from animal skins, and sandals woven from yucca fiber or hide protected their feet. Tongva spiritual life was rich, with ceremonies marking events like the summer solstice and communal mourning rituals for the dead. They had deep knowledge of local plants for food, medicine, and materials, reflecting a relationship with the land that was both practical and spiritual.

When the Spanish first arrived in the 1770s, the Tongva population in the entire Los Angeles Basin, including the San Gabriel Valley, is estimated to have been between 5,000 and 10,000 people.

Spanish period (1769–1821)

Following the arrival of a Spanish expedition led by Christopher Columbus to islands in what we now call the Caribbean in 1492, a dispute arose between Castille (Spain) and Portugal about which kingdom would own "new" lands discovered to the west of the Atlantic Ocean. This was resolved by the Inter caetera Papal bull from Pope Alexander VI, which divided all newly discovered lands outside Europe between the Kingdom of Portugal and the Crown of Castile, along a meridian 100 leagues (370 miles/600 kilometers) west of the Cape Verde islands. This gave Portugal most of Africa and Asia, and most of the Americas to Castille (Spain). Although theoretically already granted this land by the Pope, California's Spanish colonial era began in 1542 when Juan Rodríguez Cabrillo, commissioned by Viceroy Antonio de Mendoza, became the first European to explore and claim the entire California coast for Spain. Thereafter, Spain took no action to solidify its claims over Alta California (the present-day U.S. states of California, Nevada, and neighboring areas) for over two centuries. By the late 1760s, concerned about Russian and French colonial ambitions, Spain began efforts to establish permanent settlements and fortifications in Alta California. In 1769, an expedition under Gaspar de Portolá, appointed "Governor of the Californias," commenced the founding of a network of missions, pueblos (civilian settlements), and presidios (military outposts). Junípero Serra, leader of the Franciscan missionaries, managed the religious conversion and daily activities at these missions. To strengthen the sparse colonial population, Spanish authorities allowed and encouraged non-Spanish settlers to establish themselves in California.

Spain's colonial system in California, including land grants (ranchos), missions, and presidios, followed a pattern of indirect governance and religious conversion inspired by the Iqta' system used by Muslim conquerors during their rule in Spain (711–1492). The area of modern Glendora fell under the jurisdiction of Mission San Gabriel Arcángel, founded in 1771, which had direct ecclesiastical and administrative oversight, including managing local affairs, overseeing agricultural production, and compelling local Tongva peoples into labor under harsh, slave-like conditions. The indigenous population had no natural immunity to Old World diseases introduced by settlers, in particular small pox, or by their livestock (which brought influenza, anthrax, leptospirosis, and bovine tuberculosis), resulting in major population declines.

The nearest colonial civilian settlement to present-day Glendora was El Pueblo de Nuestra Señora la Reina de los Ángeles (present-day Los Angeles), founded in 1781. Beyond the relatively small contingents of soldiers at the pueblo and at the mission, military protection for the region was provided by presidios at San Diego (founded in 1769) and Santa Barbara (founded in 1782). Glendora during this period was sparsely populated except for free-roaming cattle and seasonal use by the dwindling population of Tongva who had not been forcibly brought to live near, and put in service of, the San Gabriel Mission.

By the end of the Spanish period (circa 1820–1821), the Tongva population of the Los Angeles Basin, including the San Gabriel Valley, had dramatically declined from an estimated 5,000–10,000 in pre-contact times to approximately 1,500 individuals, largely due to the introduction of Old World diseases, the disruption of traditional ways of life, and harsh conditions under missionization.

Mexican period (1821–1848)

After 11 years of struggle, Mexico gained independence from Spain on September 27, 1821. California remained a remote frontier territory with minimal oversight from the newly established Mexican government. Due to political instability and administrative difficulties, Mexico did not formally appoint a fully recognized governor for California until 1824, when Luis Antonio Argüello took office; however, his authority was initially limited by poor communication, political uncertainty across Mexico, and California's geographic isolation, leaving local communities largely responsible for their own governance. The management of land and settlement remained informal, with boundaries defined loosely by natural landmarks, and taxation often fulfilled through contributions of livestock or goods rather than uniform cash payments. This informal governance set the stage for significant challenges when California later transitioned to American rule. thumb|left|upright=0.8|Map of ranchos in Los Angeles County (WPA Federal Writers' Project)

The lack of oversight and clear governance proved ominous for the prosperity of the Mission San Gabriel Arcángel, which presided over present-day Glendora. Controlling approximately 1.5 million acres of some of the richest land with the best water supplies in the region, it was one of the wealthiest of the California missions. Between 1829 and 1833, due to inadequate supervision, corruption among local authorities, and widespread cattle rustling, the Mission's livestock declined dramatically from roughly 13,000 head of cattle to fewer than 75. Soldiers, ranchers, and settlers took advantage of the weakening authority of the Franciscan priests, who had few means to protect Mission resources without effective military support from the Mexican troops, many of whom participated in or overlooked the theft.

In August 1833, this deteriorating situation culminated in the Decree for the Secularization of the Missions of California. Motivated by concerns that the missions, still operated by Spanish-born Franciscan clergy presumably loyal to Spain and the Catholic Church, could perpetuate Spanish influence and undermine independence, the Mexican government transferred control of Church land holdings to the territorial government in Monterey. The decree officially intended to emancipate Indigenous peoples from conditions resembling slavery and redistribute mission lands to them. However, in practice, very few Indigenous Californians received any land anywhere in the Alta California territory. The Mexican government allowed the padres to keep only the church, priests' quarters, and priests' garden. The army troops guarding the Mission were dismissed.

With the Franciscans' oversight removed, Mission San Gabriel's remaining herds of cattle rapidly disappeared, taken by local rancheros, settlers, soldiers, and even former mission administrators. The few remaining priests were powerless to stop them as they now lacked both the authority and manpower to enforce control. This chaotic transition facilitated the ambitions of influential settlers, soldiers, and rancheros with connections to the Mexican authorities in Monterey, resulting in large ranchos owned by a few powerful families.

In 1837, Governor Juan Bautista Alvarado granted the Rancho San José (approximately 22,000 acres) to Ygnacio Palomares and Ricardo Vejar, encompassing southern portions of present-day Glendora as well as areas now known as Pomona and San Dimas. In 1841, another tract including the western parts of present-day Glendora, Rancho El Susa, was granted to Luis Arenas. In 1844, English immigrant Henry Dalton purchased Rancho El Susa from Arenas and acquired a one-third stake in Rancho San José. Dalton renamed his property Rancho Azusa de Dalton, establishing vineyards, orchards, and livestock herds. Central and northern Glendora remained public land for open range cattle grazing.

By the end of the Mexican period in 1848, the Tongva population in the entire Los Angeles Basin, including the San Gabriel Valley, had further declined to approximately 800 individuals, reflecting continued displacement, harsh labor conditions on ranchos, epidemics, and marginalization under Mexican governance.

American Period (1848–present)

End of the Rancho era and land disputes (1848–1870)

The conclusion of the Mexican–American War in 1848 and the cession of California to the United States brought severe challenges for ranchero landowners, including the Californio families in the Glendora area. The 1848 Treaty of Guadalupe Hidalgo pledged that Mexican-era land grants would be respected, but a significant challenge soon arose because Spanish and Mexican authorities in California had used informal systems to define land boundaries, relying on personal relationships and natural landmarks such as hills, streams, and trees. Formal cadastral surveying techniques were viewed as unnecessary in the sparsely populated region. When California became part of the United States, American authorities required precise land surveys and uniform taxation, creating substantial legal and financial burdens for Californio rancheros, who were accustomed to the earlier informal methods. Many rancheros, including local landowner Henry Dalton, faced protracted legal disputes as they struggled to prove ownership of lands previously informally documented.

The federal Land Act of 1851 required all holders of Spanish or Mexican land grants to file claims and prove their titles before a special Public Land Commission and U.S. courts, or else forfeit their lands. This process proved lengthy and costly, often lasting over a decade and involving significant expenses for attorneys, translators, and surveyors. Moreover, California's new state government imposed property taxes on large landholdings, a sharp departure from Mexican rule, which had not taxed land ownership. Many Californio rancheros, being land-rich but cash-poor, struggled to pay these taxes and mounting legal fees, leading them to mortgage, sell, or cede large portions of their ranchos.

In the Glendora area, by the time of American rule, British-born ranchero Henry Dalton owned a 4,431-acre land grant encompassing parts of present-day Azusa, Glendora, and surrounding communities, and had also purchased adjacent ranchos including San Francisquito and Rancho Santa Anita, creating a vast land holding stretching from San Dimas to the eastern boundary of present-day Pasadena. After U.S. annexation, Dalton filed his land claim with the Land Commission in 1852 and eventually received a federal patent in 1876. Despite this legal victory, the cost was significant. Dalton disputed an 1860 federal survey that substantially reduced the size of his rancho, opening it to homesteaders. Dalton's efforts to challenge this survey involved decades of costly litigation and required loans from creditors such as Los Angeles banker Jonathan S. Slauson. Ultimately, Dalton was forced to relinquish nearly all his land to settle debts, retaining only a 55-acre homestead near the modern boundary between Azusa and Glendora. Dalton died nearly penniless in 1884, exemplifying the challenges Californio rancheros faced as legal disputes and financial burdens reshaped land ownership across Southern California.

Founding and modern development (1887–present)

thumb|Glendora, Los Angeles County, California 1888 Lithograph

Like many cities in the San Gabriel Valley, Glendora was established on previously remote agricultural land during the Southern California real estate boom of the 1880s. Real estate values in the area rose especially quickly in anticipation of the completion of the Los Angeles and San Gabriel Valley Railroad in May 1887 which connected the area to Los Angeles and the national rail network. In the late 1880s, fierce competition between Santa Fe and rival railroads like Southern Pacific triggered a dramatic reduction in passenger fares, causing ticket prices from major hubs such as St. Louis to Los Angeles to plummet from more than $100 to under $10. This unprecedented affordability attracted tens of thousands of migrants and settlers to Southern California, significantly accelerating the region's development and growth.

The modern-day city of Glendora began with three separate settlements:

Glendora, north of Ada Avenue and the Glendora train station
Alosta, south of Ada Avenue and the train station, and north of the South Hills
Charter Oak, south of the South Hills, parts of which are still unincorporated or annexed into neighboring cities.

Located at the foot of the San Gabriel Mountains, Glendora was started on of an property George Dexter Whitcomb purchased in 1885 plus and an additional acquired by Merick Reynolds, John W. Cook, and Whitcomb’s two sons, Carrol S. and William C. Whitcomb, under the name the “Glendora Land Company.” On the first day of sale, April 1, 1887, 300 lots were sold. Later that month, the Suydam family built the first building erected after Glendora officially became a town – a barn at 645 N Vista Bonita Avenue, which served as their home until their house was completed in October.

George D. Whitcomb, the founder of the Whitcomb Locomotive Works in Chicago and Rochelle, Illinois, had moved to the San Gabriel Valley in the early 1880s for health reasons and to enjoy the climate and landscape of the area. The company introduced passenger service via an extension of the Pacific Electric Railway's Monrovia–Glendora Line, offering hourly, direct connections from downtown Glendora to the Pacific Electric Building at Sixth and Main in Downtown Los Angeles. At least as importantly, Pacific Electric also delivered commercial electricity to Glendora for the first time, dramatically transforming daily life in the community. Pacific Electric rail lines seldom turned a profit directly from passenger fares; instead, the company's business model primarily relied on generating revenue by supplying electricity to the rapidly growing towns along its routes, which flourished thanks to the essential transportation infrastructure provided by the railway before the widespread adoption of automobiles. Prior to its 1911 incorporation, Glendora's administrator officially occupied the office of President of Glendora.

Glendora experienced significant growth during Southern California's citrus boom in the early 20th century, becoming a thriving hub for citrus production. At its peak in 1947, the local citrus industry encompassed over 5,000 acres of orange and lemon orchards, supported by six packing houses processing approximately 78,000 tons of fruit annually, valued between $4 million and $8 million (roughly $60–120 million in 2025 dollars).

The downtown area as it appears now is the product of years of renovation and maintenance by the city. The former opera house, movie theatre, Pacific Electric station, banks, hotels, grocery and department stores were converted for modern uses. The original layout can be read about on the Downtown Glendora Historical Walk, by reading placards placed along Glendora Avenue (previously called Michigan Avenue). The original townsite was bounded by Sierra Madre Avenue on the north, Minnesota Avenue on the east, Ada Avenue and the railroad on the south, and Pennsylvania Avenue on the west.

Glendora used to be home to several military academies, which have since been converted into either churches or private school facilities. These academies included Brown Military Academy, now St. Lucy's Priory High School and Church of the Open Door on Sierra Madre, and Harding Military Academy, whose property is now home to North Glendora Private, a prestigious private community adjacent to Easley Canyon atop Glendora Avenue.

From 1960 to 1978, Glendora was home to Clokey Productions which produced 85 episodes of Gumby and 65 episodes of Davey and Goliath in a studio on Fleetwood Place near Grand Avenue and Arrow Highway. In celebration of this history, Glendora hosted a Gumby Fest in 2014 which brought thousands of people from around the country and Canada. In 2015 a second GumbyFest was held at Citrus College over an entire weekend. In 2024, the city of Glendora launched new branding including a new city logo in a "'Gumby' shade of green."

Several wildfires have affected the city in recent years, the most notable being the campfire triggered Colby Fire, which displaced hundreds of Glendora residents. A relief concert titled "Glendora Band Aid" was held shortly after the fire to help raise funds to assist the homeowners who lost their homes in the fire.

Glendora has an active Chamber of Commerce, established in 1903. The mission of the Glendora Chamber is to provide tools and resources to assist the business community in prospering and adapting to the economic climate, while growing membership and promoting local purchasing.

File:Glendora-1920.jpg|Glendora, 1920.

File:Early Alosta-Glendora Map.jpg|Early Alosta-Glendora Map 1888. View looking north from present-day South Hills Park Wilderness Area

File:Glendora_in_2017.jpg|(2017) view from the South Hills

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Geography

thumb|right|Glendora with the [[San Gabriel Mountains in the background]]

The city lies in the eastern end of the San Gabriel Valley between the San Gabriel Mountains range to the north and the South Hills to the south of most of the city.

According to the United States Census Bureau, the city has a total area of , of which is land and , or 0.84%, is water.

Geology

Approximately 15–17 million years ago, during the Miocene, lava erupted in the area that is now Glendora. Lava flows and volcanic debris hardened into rock that geologists call the "Glendora Volcanics," a stratigraphic unit first described in the foothills near the city. No volcanic cone remains. Today, these volcanic rocks are mapped by the U.S. Geological Survey and form much of the base of the South Hills.

Climate

thumb|right|Glendora Village in 2009 with [[2009 California wildfires|Morris Fire smoke plume]]

Glendora has a dry Mediterranean climate (Köppen Csa) characterized by hotter summers and slightly cooler winters than coastal areas of California. The dry weather lasts for most of the year except for the rainy season in the winter. Hot summer temperatures and warm Santa Ana winds in the fall increase the risk of wildfires in the surrounding mountains.

Between 1896 and 1991, eight fires burned more than 120 acres. The 2009 Morris Fire, 2014 Colby Fire, and the 2015 Cabin Fire are some of the most recent wildfires affecting Glendora and nearby cities.

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Ecology

A survey conducted between 1967 and 1992 found four plant communities in the Glendora Foothills: dense, woody, evergreen chaparral; open coastal sage scrub with annuals growing between aromatic shrubs and sub-shrubs; fairly open oak woodland with trees 20–60 feet tall; and freshwater marsh with water-loving plants. Chaparral is most common on north-facing slopes. Coastal sage scrub is favored where rainfall is below what is preferred by chaparral, where humans repeatedly disturb the soil, or where the soil is sandy or gravelly. Freshwater marsh is found in the Big Dalton Debris Basin, which has water year-round but provides a less stable environment than naturally wet areas.