Gabriel Moraga (1765 – June 14, 1823) was a Spanish army officer in the Viceroyalty of New Spain, an Alta California explorer, and son of the pioneer José Joaquín Moraga. Although born in Fronteras, Sonora, Mexico, Moraga spent most of his life in Alta California. He died in Santa Barbara.
De Anza expeditions
Moraga was a member of both expeditions of Juan Bautista de Anza to explore and consolidate the north-western limits of Spain's colonial claims in Alta California. The first expedition in 1774 established a new overland route from Mexico. The second, in 1775-6, included numerous colonists for settlement of the area.
Gabriel Moraga was one of the first Europeans to see the Central Valley of California. He led the first official Spanish expeditions to explore the valley in 1806–1808. Many of the names which Moraga gave to places in the region (especially rivers) have survived, often in shortened and/or anglicized form:
- Sacramento River, after Moraga's Rio del Santissimo Sacramento ("River of the Most Blessed Sacrament"), later applied to the capital of California, Sacramento and Sacramento County
- San Joaquin River, later applied to the San Joaquin Valley and San Joaquin County
- Merced River, which Moraga named El Río de Nuestra Señora de la Merced (The River of Our Lady of Mercy), later applied to the city of Merced and Merced County
- Kings River, which he named Río de los Santos Reyes (River of the Holy Kings), later applied to Kings County
- Calaveras River or Río de las Calaveras (named after Native American skulls found there), later applied to Calaveras County
- Mariposa River and the old name of the Chowchilla River, Big Mariposa River, later applied to the town of Mariposa and Mariposa County which was named after the swarms of butterflies Moraga found in the region of Chowchilla.
Not all of Moraga's place names have survived. Today's Stanislaus River was named Rio de Nuestra Señora de Guadalupe by Moraga. Even at the early date of Moraga's expedition, the name was redundant. Today's Guadalupe River was named in 1776 by the Portolà expedition.
- Gabriel Moraga Genealogy
- Randolph B. Marcy, The Prairie Traveler: A Hand-book for Overland Expeditions, published by authority of the War Department, (1859), ITINERARY XXI--From Fort Yuma to Benicia, California. From Lieutenant R. S. WILLIAMSON'S Report.
- Barbara Marinacci, Rudy Marinacci, California's Spanish place-names: what they are and how they got here, Presidio Press, 1980, p.98
- Fernando Martínez Laínez, Carlos Canales, Banderas lejanas: la exploración, conquista y defensa por España del territorio de los actuales Estados Unidos, EDAF, Madrid, 2009. p.360
- The Works of Hubert Howe Bancroft: History of California. 1884-90, Volume 2; Volume 19, Hubert Howe Bancroft, Henry Lebbeus Oak, William Nemos, Frances Fuller Victor, note 33, p. 5