Tocaloma Bridge

Listed on the National Register of Historic Places in 2018. 11 historic topographic surveys show this location, the earliest from 1916.

From the record

One of 50 National Register listings published here for Marin County · listed in 2018 · category: Structure.

Sources: the National Register database, National Park Service

The listing

Address. Old segment of Sir Francis Drake Blvd. across Lagunitas Cr., Tocaloma, 94956
When was it listed? September 2018
Category. structure
Census division. Northwest Marin
National Register reference number. 100002959 - assigned by the National Park Service when the property was listed.

Then and now

1916 to 1983

The ground this property stands on, surveyed 67 years apart. Drag the handle to wipe between them. Both sheets are United States Geological Survey originals; neither has been altered.

Topographic sheet covering Tocaloma Bridge, surveyed 1983

Topographic sheet covering Tocaloma Bridge, surveyed 1916

Fires near this property

42 since 1992

Regional context, not property-specific evidence. The federal wildfire occurrence database lists 42 fires within 5 miles of Tocaloma Bridge between 1992 and 2020, burning about 5,237 acres in total. 5 started naturally. None was 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
Power generation/transmission/distribution	11
Equipment and vehicle use	7
Missing data/not specified/undetermined	7
Natural	5
Recreation and ceremony	3
Smoking	3
Fireworks	2
Debris and open burning	2
Misuse of fire by a minor	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
3 September 1994	Smoking	under an acre	Point Reyes National Seashore	SKIDPAN
26 September 2017	Missing data/not specified/undetermined	1.4 acres	Point Reyes National Seashore	SHORELINE
22 September 1999	Natural	under an acre	Point Reyes National Seashore	HAGGERTY
21 September 2017	Missing data/not specified/undetermined	8.2 acres	Point Reyes National Seashore	DRAKE 2
20 September 1993	Power generation/transmission/distribution	52 acres	Golden Gate National Recreation Area	GENAZZI
11 September 2015	Missing data/not specified/undetermined	1.0 acres	Marin County Fire Department	not named
10 September 2018	Equipment and vehicle use	151 acres	California Department of Forestry & Fire Protection	not named
9 August 2002	Equipment and vehicle use	under an acre	Golden Gate National Recreation Area	WHITEGATE

Every fire recorded in Marin County

Mines and quarries near this property

10 of 19 shown

Regional context, not property-specific evidence. The federal mineral resources record lists 19 workings within 5 miles of Tocaloma Bridge: 14 occurrences, 2 unknowns, 2 producers, 1 past producer. 2 still produce. What was taken out: Stone, Crushed/Broken, Tungsten, Gold, Mercury. Distance is straight-line from the map coordinates, so a quarry counted here may appear on a neighbouring settlement's page as well.

Site	Commodity	Status	Recorded
Black Mountain	Stone	Occurrence
Fort Baker	Manganese, Gold	Occurrence	Psilomelane
Heaton's Flat	Gold, Silver	Past Producer
Mount Tamalpais Cemetery Quarry.	Stone, Stone, Dimension, Stone, Crushed/Broken	Occurrence
Unnamed Location	Gemstone	Occurrence
Claims	Mercury	Occurrence
Claims	Mercury	Occurrence
Inverness	Tungsten	Occurrence	Scheelite
Inverness Ridge	Gold	Unknown
Inverness Ridge	Gold	Occurrence

Every working recorded in Marin County

Storms near this property

3 since 2019

Regional context, not property-specific evidence. The National Weather Service names Tocaloma, the town this property stands in, in 3 storm reports between 2019 and 2025: 2 flood, 1 debris flow. The reports record 1 injury. 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
February 2025	Flood	Tocaloma	1 hurt, $10	A woman drove through a downpour on Platform Bridge Road before a large puddle caused her to lose control and crash into a flooded creek. A Marin County Sheriffs deputy rescued her and helped her reach safety. Some additional vehicles became stuck after they ignored road closure signs.
February 2019	Flood	Tocaloma	-	Platform Bridge Rd closed due to flooding.
February 2019	Debris Flow	Tocaloma	-	Debris flow blocking west bound lane of Sir Francis Drake Blvd near Platform Bridge Rd.

Every storm recorded in Marin County

Maps showing this location

11 surveys

United States Geological Survey topographic sheets whose coverage includes this point. Matched by taking the coordinate the National Park Service records for this property, then testing that coordinate against the published boundary of every sheet.

1916 USGS Point Reyes quadrangle1:48000
1916 USGS Point Reyes quadrangle1:62500
1918 USGS Point Reyes quadrangle1:62500 - 6 printings
1947 USGS Santa Rosa quadrangle1:250000
1949 USGS Santa Rosa quadrangle1:250000 - 2 printings
1954 USGS Inverness quadrangle1:24000 - 6 printings
1954 USGS Point Reyes quadrangle1:62500 - 5 printings
1958 USGS Santa Rosa quadrangle1:250000 - 3 printings
1962 USGS Santa Rosa quadrangle1:250000
1964 USGS Santa Rosa quadrangle1:250000
1983 USGS Napa quadrangle1:100000

Listed places nearby

4 within 8 miles

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.

Property	Distance	Listed
Olema Valley Dairy Ranches Historic District	3.6 miles	2018
The Last Resort Historic District	3.9 miles	2024
Olema Lime Kilns	4.3 miles	1976
Brock Schreiber Boathouse and Beach	6.3 miles	1978

Sources for this property

National Archives record	The nomination case file for reference 100002959 in Record Group 79.
Marin County	All 50 listed properties in this county.

Provenance

Listing record. National Park Service National Register of Historic Places, listed-properties dataset, current to 2026-05-22.
Map join. Address geocoded through the United States Census geocoder, then tested against the published boundary of every sheet in the USGS Historical Topographic Map Collection.
How this page is made. Listing fields come from federal records; map-sheet coverage is a labelled coordinate-to-boundary calculation, not a source-field claim.
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.
Storms. NOAA National Centers for Environmental Information, Storm Events Database https://www.ncei.noaa.gov/stormevents/ A work of the United States government, no copyright under 17 U.S.C. 105. Narratives are quoted verbatim from the National Weather Service report and are not edited or summarised.