Corral Hollow, formed by Corral Hollow Creek, is a canyon partially located in Alameda County, with parts in San Joaquin County, southwest of Tracy, California. Corral Hollow Creek, formerly El Arroyo de los Buenos Ayres (The Creek of the Good Winds), from its source north of Mount Boardman, flows north 1.89 miles where it turns to flow west-northwest then turns abruptly east in the vicinity of Tesla to flow east where it turns again in a northeasterly direction for to the Delta-Mendota Canal in the San Joaquin Valley. History Etymology El Camino Viejo, the oldest route between Los Angeles and San Francisco, passed to the west through the canyon then known as El Arroyo de los Buenos Ayres over the Portezuela de Buenos Ayres (Pass of Good Winds) to the Arroyo Seco and the Livermore Valley. The '49ers traveled through the canyon now named Corral Hollow on their way to the gold fields, as did the first mail to the Tuolumne mines. The name change was perhaps because at its mouth there was a large corral for catching wild horses. This "caral" was mentioned in the California Star on March 18, 1848: "We are credibly informed...that a number countrymen with several Californians are actively engaged in building an extensive caral, or enclosure, in the valley of the river San Joaquin, for the purpose of capturing wild horses. The caral...will enclose twenty-five acres of land..." However, the name of the creek did not change for some time. The name "Arroyo Buenos Ayres" appears on Charles Drayton Gibbes' "Map of the Southern Mines" in 1852. An 1857 map of California shows the canyon was named Corral Hollow, but Buenos Ayres Creek, although anglicised, remained with its old name. By 1873, a State Geological Survey map indicated the name change was complete to Corral Hollow Creek and Corral Hollow Pass. Early settlements California Historical Landmark #755 indicates the site of the home of its first settler, Edward B. Carrell, which was built here at the former site of an Indian village. The men and animals received food and drink at Wright's Zink House, five hundred yards north of the landmark site. California Landmark #755 (now missing) was located 1.5 miles west of I-580 on County Hwy J2, Corral Hollow Road. (Coordinates on this page mark that site.) Carnegie and Tesla Some miles up the Corral Hollow Road in the canyon is the site