Regional Codes ...
For statistical purposes, the US Census Bureau has divided the country into four Regions. Hidden Valley Lake is located in Region #4 (the West Region).
In turn, the US Census Bureau has further divided each Region into Divisions. Hidden Valley Lake is located in Division #9 (the Pacific Division).
The Office of Management and Budget (OMB) has created ten Federal Regions. Hidden Valley Lake is located in Region IX (Region 9).
The Federal Emergency Management Agency (FEMA) has created ten Management Regions. Hidden Valley Lake is located in Region IX (Region 9).
Referenced GNIS Records ...
GNIS ID #1766196 (Name of Record: Hidden Valley Lake)
Class: populated place
A place or area having clustered or scattered buildings and a permanent population (such as a city, settlement, town or village). The boundaries may or may not coincide with the perceived population.
A 'populated place' record may have a corresponding 'census' or 'civil' record. The information contained in the 'populated place' record applies only to the class and should not be confused with either the 'census' and 'civil' classes.
Map Name: Middletown
Lat: 38.8079573 Lon: -122.5583155 [Map]
Elev: 363 ft.
Referenced FIPS Records ...
FIPS Code: 06/33549 (Place Name: Hidden Valley Lake)
County: Lake (FIPS State/County: 06/033)
MRF Code: 1256