DeWenter Mansion, Guest House and Grounds

Listed on the National Register of Historic Places in 1992. 20 historic topographic surveys show this location, the earliest from 1894.

From the record

One of 616 National Register listings published here for Los Angeles County · listed in 1992 · category: Building.

Sources: the case file at the National Archives · the National Register database, National Park Service

The listing

What is counted as historic. The nomination lists 3 buildingss, 1 site as contributing to the listing.
Address. 6100 Brydon Rd., La Verne, 91750
When was it listed? November 1992
Category. building
Census division. East San Gabriel Valley
National Register reference number. 92001559 - the number the National Park Service assigned this property when it was listed, and the key its nomination file is catalogued under at the National Archives.

Then and now

1894 to 1995

The ground this property stands on, surveyed 101 years apart. Drag the handle to wipe between them. Both sheets are United States Geological Survey originals; neither has been altered.

Topographic sheet covering DeWenter Mansion, Guest House and Grounds, surveyed 1995

Topographic sheet covering DeWenter Mansion, Guest House and Grounds, surveyed 1894

Fires near this property

328 since 1992

Regional context, not property-specific evidence. The federal wildfire occurrence database lists 328 fires within 5 miles of DeWenter Mansion, Guest House and Grounds between 1992 and 2020, burning about 11,707 acres in total. 8 started naturally. 79 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	95
Arson/incendiarism	79
Equipment and vehicle use	36
Misuse of fire by a minor	28
Power generation/transmission/distribution	20
Fireworks	19
Smoking	18
Recreation and ceremony	12
Debris and open burning	9
Natural	8
Other causes	4

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 2008	Equipment and vehicle use	under an acre	Angeles National Forest	GLENDORA
8 September 2005	Arson/incendiarism	under an acre	Angeles National Forest	FLARE
7 September 2013	Missing data/not specified/undetermined	under an acre	Angeles National Forest	ROCKY
6 September 1995	Misuse of fire by a minor	1.0 acres	Angeles National Forest	POWER
5 September 2020	Debris and open burning	1.0 acres	Los Angeles County Fire Department	not named
5 September 2005	Arson/incendiarism	under an acre	Angeles National Forest	STATION
5 September 2004	Smoking	under an acre	Angeles National Forest	PALMER
4 September 2009	Missing data/not specified/undetermined	2.0 acres	Angeles National Forest	RESERVOIR

Every fire recorded in Los Angeles County

Mines and quarries near this property

10 of 14 shown

Regional context, not property-specific evidence. The federal mineral resources record lists 14 workings within 5 miles of DeWenter Mansion, Guest House and Grounds: 7 past producers, 3 occurrences, 2 prospects, 1 producer. 1 still produces. What was taken out: Sand and Gravel, Construction, Gold, Stone, Stone, Dimension. 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
Eva Canyon	Graphite	Occurrence
Lordsburg Deposit	Stone	Producer
Lordsburg Deposit	Stone, Dimension	Past Producer
Lost Treasure	Silver	Prospect
San Antonio Canyon Corundum	Corundum	Occurrence
San Dimas Barite Deposit	Barium-Barite	Past Producer
San Dimas Rock Co.	Stone, Crushed/Broken	Past Producer
Unnamed Location	Clay	Unknown
Upland South Pit	Sand and Gravel, Construction, Gold, Silver	Past Producer
Dime Canyon Prospect	Gold	Occurrence

Every working recorded in Los Angeles County

Storms near this property

2 since 1997

Regional context, not property-specific evidence. The National Weather Service names La Verne, the town this property stands in, in 2 storm reports between 1997 and 1998: 1 dust devil, 1 thunderstorm wind. 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
August 1998	Thunderstorm Wind	La Verne	-	Strong thunderstorm winds, estimated at 60 mph, knocked down several trees with diameters of one foot or greater.
April 1997	Dust Devil	La Verne	-	A dust devil developed over a mobile home park in La Verne. Two mobile homes had their roofs blown off by the dust devil.

Every storm recorded in Los Angeles County

Maps showing this location

20 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.

1894 USGS Pomona quadrangle1:62500
1897 USGS Pomona quadrangle1:62500
1898 USGS Pomona quadrangle1:62500 - 2 printings
1901 USGS Southern California Sheet No. 1 quadrangle1:250000 - 6 printings
1904 USGS Pomona quadrangle1:62500 - 7 printings
1904 USGS Southern California Sheet No. 1 quadrangle1:250000 - 2 printings
1928 USGS La Verne quadrangle1:24000 - 2 printings
1933 USGS La Verne and Evey Canyon quadrangle1:24000
1940 USGS La Verne quadrangle1:24000 - 3 printings
1940 USGS La Verne quadrangle1:20000
1953 USGS Glendora quadrangle1:24000 - 3 printings
1953 USGS San Bernardino quadrangle1:250000 - 2 printings
1956 USGS San Bernardino quadrangle1:250000
1957 USGS San Bernardino quadrangle1:250000
1958 USGS San Bernardino quadrangle1:250000
1959 USGS San Bernardino quadrangle1:250000
1966 USGS Glendora quadrangle1:24000 - 2 printings
1966 USGS San Bernardino quadrangle1:250000
1982 USGS San Bernardino quadrangle1:100000
1995 USGS Glendora quadrangle1:24000

Listed places nearby

6 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
Pitzer House	2.4 miles	1986
Charles E. Straight House	2.5 miles	1992
Padua Hills Theatre	3.2 miles	1998
Peter Drucker House	3.4 miles	2017
San Dimas Hotel	4.2 miles	1972
Ygnacio Palomares Adobe	4.2 miles	1971

Sources for this property

National Archives record	The nomination case file for reference 92001559 in Record Group 79.
Los Angeles County	All 616 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.