Westridge, California
51 topographic sheets cover this place, the earliest surveyed in 1897 and the latest in 1997. It stands in the San Mateo census division. It lies in ZIP code area 94028. It lies near Jasper Ridge. The Survey maps it on the Palo Alto quadrangle.
Then and now
1897 to 1997The same ground, surveyed 100 years apart. Drag the handle to wipe between them. Both sheets are United States Geological Survey originals; neither has been altered.


Compare 1897 against another survey:
On record in Westridge
Buildings and businesses the archive holds for this place. Each opens its own page, with the source record it came from.
On the National Register within a mile 1 record
The National Register names another town for these. They stand within one mile of this settlement's coordinate.
Portola Valley Schoollisted 1974 · 0.9 miles away
Topographic sheets covering this place
22 surveys from 51 printed sheetsMatched by testing this settlement's coordinate against the published boundary of every sheet in the United States Geological Survey's historical collection. Each opens the scanned sheet at the Survey.
- 1897 USGS Palo Alto quadrangle1:62500
- 1899 USGS Palo Alto quadrangle1:62500, 11 printings
- 1902 USGS Santa Cruz quadrangle1:125000, 9 printings
- 1941 USGS Palo Alto quadrangle1:62500
- 1943 USGS Palo Alto quadrangle1:62500
- 1947 USGS San Francisco quadrangle1:250000
- 1948 USGS Palo Alto quadrangle1:62500
- 1948 USGS San Francisco quadrangle1:250000
- 1953 USGS Palo Alto quadrangle1:24000, 2 printings
- 1955 USGS San Francisco quadrangle1:250000
- 1956 USGS San Francisco quadrangle1:250000, 4 printings
- 1957 USGS San Francisco quadrangle1:250000
- 1960 USGS San Francisco quadrangle1:250000
- 1961 USGS Palo Alto quadrangle1:62500, 3 printings
- 1961 USGS Palo Alto quadrangle1:24000, 4 printings
- 1961 USGS San Francisco quadrangle1:250000
- 1964 USGS San Francisco quadrangle1:250000
- 1971 USGS San Francisco quadrangle1:250000
- 1982 USGS Palo Alto quadrangle1:100000, 2 printings
- 1985 USGS San Francisco quadrangle1:250000
- 1991 USGS Palo Alto quadrangle1:24000, 2 printings
- 1997 USGS Palo Alto quadrangle1:24000
Fires near this place
161 since 1992Regional context, not property-specific evidence. The federal wildfire occurrence database lists 161 fires within 5 miles of Westridge between 1992 and 2020, burning about 148 acres in total. 5 started naturally. 10 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 | 92 |
| Equipment and vehicle use | 34 |
| Arson/incendiarism | 10 |
| Misuse of fire by a minor | 8 |
| Smoking | 6 |
| Natural | 5 |
| Debris and open burning | 4 |
| Power generation/transmission/distribution | 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 |
|---|---|---|---|---|
| 6 September 2013 | Equipment and vehicle use | 1.2 acres | San Mateo-Santa Cruz Unit | ALPINE |
| 5 September 2020 | Arson/incendiarism | under an acre | San Mateo-Santa Cruz Unit | CONTROL BURN |
| 30 September 2018 | Missing data/not specified/undetermined | under an acre | California Department of Forestry & Fire Protection | NB HWY 280 / SAND HILL R |
| 3 September 2000 | Equipment and vehicle use | 2.0 acres | San Mateo-Santa Cruz Unit | RAPLEY |
| 28 September 2009 | Missing data/not specified/undetermined | under an acre | California Department of Forestry & Fire Protection | not named |
| 25 September 2006 | Equipment and vehicle use | 1.0 acres | San Mateo-Santa Cruz Unit | RUSSIAN |
| 23 September 2020 | Missing data/not specified/undetermined | 1.0 acres | San Mateo-Santa Cruz Unit | not named |
| 2 September 2008 | Missing data/not specified/undetermined | 2.0 acres | San Mateo-Santa Cruz Unit | WINDY HILL PICNIC AREA 11 |
Settlements close enough to share some of these fires:
Mines and quarries near this place
10 of 19 shownRegional context, not property-specific evidence. The federal mineral resources record lists 19 workings within 5 miles of Westridge: 7 producers, 6 past producers, 6 unknowns. 7 still produce. What was taken out: Stone, Mercury, Gold, Silver. 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 |
|---|---|---|---|---|
| J. M. Macdonough | Gold, Lead, Silver | Unknown | ||
| J.M. Macdonough Ranch | Gold, Silver, Lead | Past Producer | Gold | |
| Langley Hill Quarry | Stone, Crushed/Broken | Producer | ||
| Challenge | Mercury | Past Producer | 1955 | |
| Emerald Lake | Mercury | Producer | ||
| Farm Hill Cinnabar Property | Mercury | Unknown | ||
| Farm Hill No 2 | Mercury | Past Producer | ||
| Redwood Quicksilver Prospect | Mercury | Unknown | ||
| Bahr & Ledoyen, Inc. | Stone | Producer | ||
| Bahr & Ledoyen, Inc. | Stone | Past Producer |
Nearest settlements
The eight closest, with where each one stands in the county. Distances are straight-line, computed from the Geographic Names Information System coordinates.
| Map | Place | Distance | Sheets |
|---|---|---|---|
| Portola Valley | 1.1 miles | 51 | |
| Ladera | 1.2 miles | 51 | |
| Woodside Highlands | 1.6 miles | 51 | |
| Searsville (historical) | 1.6 miles | 51 | |
| Stanford Weekend Acres | 2.3 miles | 51 | |
| Sky Londa | 2.4 miles | 37 | |
| Stanford Hills | 2.5 miles | 51 | |
| Sharon Heights | 2.6 miles | 51 |
Provenance
This settlement is recorded in the Geographic Names Information System as feature 1786308. The sheet list is computed by point-in-boundary test against the United States Geological Survey's historical topographic inventory. Both are works of the United States government and carry no copyright under 17 U.S.C. 105.
Wildfire. Short, Karen C. 2022. Spatial wildfire occurrence data for the United States, 1992-2020 [FPA_FOD_20221014]. 6th Edition. Fort Collins, CO: Forest Service Research Data Archive. https://doi.org/10.2737/RDS-2013-0009.6 Collected with United States Government funding and usable without additional permissions or fees.
Mines and quarries. USGS Mineral Resources Data System (MRDS) https://mrdata.usgs.gov/mrds/ A work of the United States government, no copyright under 17 U.S.C. 105.





















