Anza-Borrego Desert State Park
state park in California
Anza-Borrego Desert State Park (, AN-zə bə-RAY-goh) is a California State Park located within the Colorado Desert of Southern California, United States. Created in 1932, the park takes its name from 18th century Spanish explorer Juan Bautista de Anza and borrego, a Spanish word for sheep. With 650,000 acres (260,000 ha) that includes one-fifth of San Diego County, it is the largest state park in California and the third largest state park nationally.
The park occupies eastern San Diego County and reaches into Imperial and Riverside counties, enveloping two communities: Borrego Springs, which is home to the park's headquarters, and Shelter Valley.
Geography
The park is an anchor in the Mojave and Colorado Deserts Biosphere Reserve, and adjacent to the Santa Rosa and San Jacinto Mountains National Monument.
The great bowl of the surrounding desert is surrounded by mountains, with the Vallecito Mountains to the south and the highest Santa Rosa Mountains to the north which are in the wilderness area, without paved roads and with the only year-round creeks.
Blair Valley is a valley in the State Park.
It consists of the main Blair Valley and Little Blair Valley separated by a small mountain range over which Foot and Walker Pass leads.
To the west of the valley lies Granite Mountain, to the east the range of Vallecito Mountains.
The valley can be crossed by dirt roads, e.g., to reach a look-out point over Smuggler Canyon or sites of Indian pre-Hispanic art.
Begin with the source’s own compact description: “Anza-Borrego Desert State Park” is state park in California. The dossier treats that line as a proposition to test through Anza-Borrego, Desert and State, not as a finished interpretation.
Why this record matters
The phrase “state park in California” supplies a clear boundary for inquiry. It also exposes the unanswered questions: who defined that boundary, when it became stable and which sources sit outside it.
Maps, plans, fabric surveys and administrative records can establish how the site’s name, extent and function changed over time. The source revision retrieved here is dated Sep 19, 2026. The linked authority identifier is Q614115. The first chronological checks are 1932.
Architectural summaries often privilege surviving fabric and can understate demolished phases, contested use or displaced communities. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Treat names, boundaries and functions as historically changeable. Maps, plans, inventories and administrative records can clarify what the place meant at different dates.
- Historic place names
- Jurisdictional context
- Routes into maps and plans
Contemporary maps, plans, listed-building records, estate papers and the responsible local or national archive.
Three-step research path
- Establish the record: confirm the title “Anza-Borrego Desert State Park”, its source revision and the description used here.
- Expand the search: follow Anza-Borrego Desert State Park primary sources, Anza-Borrego Desert State Park archive and Anza-Borrego research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
- Which source most directly establishes the central claim about “Anza-Borrego Desert State Park”?
- Which authority defined the place, boundary or structure at the relevant date?
- What physical evidence or contemporary plan supports the description?
Search terms from this dossier
This entry incorporates text from “Anza-Borrego Desert State Park” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.