National Register of Historic Places

Rancho Canada de los Osos y Pecho y Islay

San Luis Obispo, San Luis Obispo County, California
Listed
June 19, 1975
Type
Site
Period
Colonial
Ref No.
75000477

About this property

Rancho Cañada de los Osos y Pecho y Islay was a 32,431-acre (131.24 km2) Mexican land grant in Los Osos Valley and the southern Estero Bay headlands, in present-day San Luis Obispo County, California. The grant consists of Rancho Cañada de Los Osos (Valley of the Bears), granted in 1842 by Governor Juan Bautista Alvarado to Víctor Linares, and Rancho Pecho y Islay, granted in 1843 by Governor Manuel Micheltorena to Francisco Badillo. The grants were consolidated in the 1845 grant of Rancho Cañada de los Osos y Pecho y Islay by Governor Pío Pico to James Scott and John Wilson, after they had been purchased from the original grantees. The Cañada de Los Osos grant extended from the Pacific Coast, along Los Osos Creek and the Los Osos Valley almost to present-day San Luis Obispo, and southward encompassed what is now the town of Los Osos, Montaña de Oro State Park north of Islay Creek, and the northern Irish Hills. The Rancho Pecho y Islay grant was a strip of coastal plain along the Pacific Ocean that ran from Islay Creek to Pecho Creek and up that creek to the summit of the Irish Hills to the "boundary with the land of Don Victor Linares." It includes the southern part of Montaña de Oro State Park and the site of the Diablo Canyon Power Plant.

Location

San Luis Obispo, San Luis Obispo County, California

Categories

PREHISTORICHISTORIC - ABORIGINALAGRICULTURE
Sources

Property data from the National Register of Historic Places, National Park Service (public domain).

Description adapted from Wikipedia under the Creative Commons Attribution-ShareAlike 4.0 International License.

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Overview
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The Land
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Geology
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LiDAR Terrain
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Conflict & War
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The Civil War
The Civil War on this ground, 1861 to 1865: who held it, and the battles, camps and regiments nearby.
The Soldiers
The men who marched from here in the Civil War, named and traced where the record allows.
Native Heritage
The Native nations who held this land, mapped across time from before European contact to today.
Settlement
Who claimed and held this ground, from Indigenous homelands through the colonial powers to the United States.
The Community
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Rivers & Rail
The rivers, canals and railroads that connected this place between 1830 and 1911.
Notable People
The people born, buried or genuinely tied to this exact place, with their stories.
Historical Maps
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Finds & Access
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Literature
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Spotlight
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Points of Interest
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Timeline
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Questions about this property

When was Rancho Canada de los Osos y Pecho y Islay listed on the National Register?

Rancho Canada de los Osos y Pecho y Islay was listed on the National Register of Historic Places on June 19, 1975.

What type of historic resource is Rancho Canada de los Osos y Pecho y Islay?

Rancho Canada de los Osos y Pecho y Islay is classified as a site in the National Register of Historic Places.

What is the period of significance for Rancho Canada de los Osos y Pecho y Islay?

The period of significance for Rancho Canada de los Osos y Pecho y Islay is recorded as the colonial era.

Can I research the history near Rancho Canada de los Osos y Pecho y Islay?

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