Editing Ontario, California (section)

=== Mexico (1822–1847) ===
{{Main|Californios}}
In 1822, word of the Mexican triumph in the [[Mexican War of Independence]] reached Nueva California,<ref>{{Cite web |title=Mexican California {{!}} Early California History: An Overview {{!}} Articles and Essays {{!}} California as I Saw It: First-Person Narratives of California's Early Years, 1849-1900 {{!}} Digital Collections {{!}} Library of Congress |url=https://www.loc.gov/collections/california-first-person-narratives/articles-and-essays/early-california-history/mexican-california/ |access-date=March 11, 2024 |website=Library of Congress, Washington, D.C. 20540 USA}}</ref> and the lands previously controlled by the Spanish Empire passed to the custody of the [[Mexican government]].

In 1824, the province of Nueva California was renamed [[Alta California]].

In 1826, American explorer [[Jedediah Smith]] passed through what is now [[Upland, California|Upland]] on the first known overland journey from the east coast to the west coast of North America. He used Native American trails that he helped establish as the [[California Trail]]. (This later became the [[National Old Trails Road]], [[U.S. Route 66|Route 66]], and today's [[Foothill Boulevard (Southern California)|Foothill Boulevard]].)<ref>{{Cite web |last=Delja |first=Beatrice |title=CHL # 781 National Old Trails Monument San Bernadino &#91;sic&#93; |url=http://www.californiahistoricallandmarks.com/landmarks/chl-781 |access-date=February 16, 2017 |website=www.californiahistoricallandmarks.com}}</ref>

Use of the San Gabriel mission's [[Rancho Cucamonga]] was in 1839 granted to [[Tiburcio Tapia]] by Alta Californian governor [[Juan Bautista Alvarado]] as part of the [[Mexican secularization act of 1833|secularization of California land holdings]].<ref name=":02">{{Cite book |url=https://digicoll.lib.berkeley.edu/record/267557 |title=Cucamonga [San Bernardino County] Leon V. Prudhomme, Claimant. Case no. 214, Southern District of California |editor-last=Prudhomme |editor-first=Leon Victor |date=1852–1864 |editor-last2=Tapia |editor-first2=Tiburcio |editor-last3=Prudhomme |editor-first3=Leon Victor |editor-last4=United States District Court (California: Southern District)}}</ref> This emancipated the Tongva enslaved there.

The name ''Mount San Antonio'' was probably bestowed by [[Antonio Maria Lugo]], owner of [[Rancho San Antonio (Lugo)|Rancho San Antonio]] near present-day [[Compton, California|Compton]] circa 1840, in honor of his patron saint, [[Anthony of Padua]].<ref name="hps1969">Sierra Club Hundred Peaks Section, 100 Peaks Lookout newsletter, May 1969</ref>

In 1845, Rancho Cucamonga was inherited by Tapia's daughter, Maria Prudhomme, and her husband Leon Prudhomme.<ref name=":1">{{Cite web |date=24 April 1973 |title=NATIONAL REGISTER OF HISTORIC PLACES INVENTORY - NOMINATION FORM |url=https://npgallery.nps.gov/GetAsset/5fc8a379-98c2-404b-b33c-9cd5ab6399fa |website=National Park Service}}</ref>