Listed on the National Register of Historic Places in 1981. 21 historic topographic surveys show this location, the earliest from 1897.
“The Old Borges Ranch is a 1,035 acres (419 ha) historic district in the Mt. Diablo foothills within the 2,600-acre (1,100 ha) Walnut Creek Open Space in Contra Costa County, California.”
Wikipedia article Old Borges Ranch, CC BY-SA 4.0.
One of 49 National Register listings published here for Contra Costa County · listed in 1981 · category: District.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service
The ground this property stands on, surveyed 98 years apart. Drag the handle to wipe between them. Both sheets are United States Geological Survey originals; neither has been altered.
Regional context, not property-specific evidence. The federal wildfire occurrence database lists 279 fires within 5 miles of Old Borges Ranch between 1992 and 2020, burning about 968 acres in total. 2 started naturally. 41 were recorded as arson. Distance is straight-line from the map coordinates, so a fire counted here may appear on a neighbouring settlement's page as well.
| Reported cause | Fires |
|---|---|
| Missing data/not specified/undetermined | 94 |
| Equipment and vehicle use | 52 |
| Smoking | 49 |
| Arson/incendiarism | 41 |
| Misuse of fire by a minor | 28 |
| Debris and open burning | 8 |
| Power generation/transmission/distribution | 5 |
| Natural | 2 |
The most recent of them, most recent first, with the day each was reported and the service that recorded it.
| Date | Cause | Size | Reported by | Name on the report |
|---|---|---|---|---|
| 9 September 2011 | Missing data/not specified/undetermined | 33 acres | Santa Clara Unit | 3-JUN |
| 8 September 2008 | Debris and open burning | under an acre | California Department of Forestry & Fire Protection | not named |
| 7 September 2016 | Missing data/not specified/undetermined | under an acre | California Department of Forestry & Fire Protection | not named |
| 7 September 2016 | Missing data/not specified/undetermined | 2.0 acres | California Department of Forestry & Fire Protection | MITCHELL |
| 5 September 2011 | Missing data/not specified/undetermined | under an acre | Santa Clara Unit | not named |
| 5 September 2008 | Smoking | under an acre | California Department of Forestry & Fire Protection | not named |
| 30 September 2019 | Missing data/not specified/undetermined | under an acre | Santa Clara Unit | not named |
| 30 September 2010 | Arson/incendiarism | under an acre | California Department of Forestry & Fire Protection | not named |
Regional context, not property-specific evidence. The federal mineral resources record lists 51 workings within 5 miles of Old Borges Ranch: 16 occurrences, 16 past producers, 9 producers, 6 prospects. 9 still produce. What was taken out: Stone, Crushed/Broken, Copper, Silver, Stone. Distance is straight-line from the map coordinates, so a quarry counted here may appear on a neighbouring settlement's page as well.
| Where | Site | Commodity | Status | Recorded |
|---|---|---|---|---|
| Black Point | Copper, Mercury | Occurrence | Vein | |
| Clark & Sons | Clay | Prospect | ||
| Cowell | Limestone, Dimension | Unknown | ||
| Cowell Silver Sand Co., Laws | Silica | Producer | Sand | |
| Mt. Diablo Lime Marl Co. | Limestone, General | Occurrence | Sedimentary | |
| Silver Mine | Copper, Manganese, Silver | Past Producer | ||
| Turtle Rock Quarry | Stone, Dimension | Producer | ||
| Arroyo Del Carro Prospect | Asbestos | Prospect | ||
| Arroyo Del Cerro Prospects | Asbestos | Occurrence | ||
| Mount Zion Chrome | Chromium | Occurrence | Chromite |
Regional context, not property-specific evidence. The National Weather Service names Walnut Creek, the town this property stands in, in 9 storm reports between 1998 and 2025: 6 flood, 2 flash flood, 1 heavy rain. No death or injury is recorded in these reports. Each account below is quoted exactly as the forecast office filed it, from the NOAA Storm Events Database, and each date opens the federal record of that event.
| When | Event | Place named | Harm | What the report says |
|---|---|---|---|---|
| April 2010 | Heavy Rain | Walnut Creek | $10,000 | A rain-slicked road led to the crash of a car at the intersection of Mount Diablo Boulevard and Iron Horse Regional Trail in Walnut Creek. The vehicle crashed through a fence and landed upside down in the rain-swollen San Ramon Creek bypass. The driver and one other individual perished, while one occupant was rescued three miles downstream. A Contra Costa County official stated that at the time of the crash, the water would have been 2.34 feet deep and flowing at 6.4 feet per second. |
| February 2025 | Flood | Walnut Creek | - | Around 8 inches of water were reported on the ramp that connects eastbound State Route 24 to southbound Interstate 680. |
| November 2019 | Flood | Walnut Creek | - | Media reported flooded roads at the intersection of Broadway and Cypress St in Walnut Creek. |
| January 2018 | Flood | Walnut Creek | - | Roadway flooding reported at I 680S and Ygnacio Valley Road on ramp. Six inches of standing water. |
| January 2018 | Flood | Walnut Creek | - | I 680 southbound lanes flooded. |
| November 2018 | Flood | Walnut Creek | - | Roadway flooding reported at I680 N and Olympic Blvd on ramp, 8-10 inches of water in number 2 lane. |
| February 1998 | Flash Flood | Walnut Creek | - | people evacuated Walnut Creek due to flash Flood. |
| February 1998 | Flash Flood | Walnut Creek | - | Streets and businesses flash flood in Walnut Creek. |
| December 2002 | Flood | Walnut Creek | - | no account filed |
United States Geological Survey topographic sheets whose coverage includes this point. Matched by taking the middle of the area the National Park Service maps for this listing, then testing that coordinate against the published boundary of every sheet.
Other National Register properties close enough to walk or drive between, ordered by distance from this one. Both positions come from the same geocoding pass that matched these properties to their map sheets.
| Photograph | Property | Distance | Listed |
|---|---|---|---|
 | Shadelands Ranch House | 2.6 miles | 1985 |
 | Robert Stanley Sr. Dollar House | 3.8 miles | 2013 |
 | Eugene O'Neill National Historic Site | 4.5 miles | 1978 |
 | Tao House | 4.7 miles | 1971 |
 | Danville Southern Pacific Railroad Depot | 4.9 miles | 1994 |
| Clayton Vineyards-DeMartini Winery | 5.3 miles | 1984 |
| National Archives record | The nomination case file for reference 81000147 in Record Group 79. |
| Wikipedia article | Community-written account of this property, licensed CC BY-SA. |
| Contra Costa County | All 49 listed properties in this county. |
Block
