Record
About Black Diamond Mines Regional Preserve
The Black Diamond Mines Regional Preserve is a 6,000-acre (2,400 ha) park located north of Mount Diablo in Contra Costa County, California under the administration of the East Bay Regional Park District (EBRPD). The district acquired the property in 1973.
This is a site record: what public sources say about Black Diamond Mines Regional Preserve, gathered in one place. We haven't written a full guide yet, so history, current access and photos are still to come. Treat the status as unknown until a guide confirms it.
Map
Where Black Diamond Mines Regional Preserve is

Historic maps
10 historic USGS maps cover Black Diamond Mines Regional Preserve
Topographic sheets from the USGS Historical Topographic Map Collection (public domain), oldest first. Older sheets often show the camp, mines and roads while the place was alive. The downloads are large map scans; USGS topoView shows them in the browser.
- 1896 Mt Diablo sheet, 1:62,500 · GeoTIFF download
- 1898 Mt Diablo sheet, 1:62,500 · GeoTIFF download
- 1916 Lone Tree Valley sheet, 1:31,680 · GeoTIFF download
- 1943 Mt Diablo sheet, 1:62,500 · GeoTIFF download
- 1947 San Jose sheet, 1:250,000 · GeoTIFF download
- 1953 Antioch South sheet, 1:24,000 · GeoTIFF download
- 1956 San Jose sheet, 1:250,000 · GeoTIFF download
- 1962 San Jose sheet, 1:250,000 · GeoTIFF download
- 1966 San Jose sheet, 1:250,000 · GeoTIFF download
- 1989 Stockton sheet, 1:100,000 · GeoTIFF download
Directions
Getting there
Before you go
- Many ghost town sites are on private land, active mining claims or tribal land. Check land status and ask permission.
- Roads to old townsites are often unmaintained dirt. Map apps may route over closed or impassable tracks.
- Removing artifacts from public land is illegal under federal and most state laws.
Nearby
Other sites near Black Diamond Mines Regional Preserve
Straight-line distance to other mapped sites in our California index.
- Stewartville0.5 mi SE · Contra Costa
- Somersville0.6 mi NW · Contra Costa
- Nortonville1.4 mi W · Contra Costa
- West Hartley2.5 mi E · Contra Costa
- Judsonville2.5 mi E · Contra Costa
- Collinsville8.8 mi N · Solano
- Eckley20.1 mi W · Contra Costa
- Cement25.4 mi N · Solano
Sources
Sources
- Wikipedia, "Black Diamond Mines Regional Preserve": coordinates and summary.
- Wikidata Q4920660.
- USGS 3D Elevation Program, elevation at the coordinates.
- USGS The National Map and Historical Topographic Map Collection (public domain).