SLO County Historic Maps

[Max Rockatansky]

SLO County apparently has a site for historical maps going back to 1870.  I stumbled upon it while researching Parkhill Road in the Pozo Area:

https://www.slocounty.ca.gov/departments/public-works/forms-documents/maps-(county-surveyor)/misc-historic-maps-(surveyors-good-stuff,-look-her

I'm finding these early maps to be really useful.  There is a lot of unique late 19th and early 20th century stuff that isn't on David Rumsey or the USGS map viewer.