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Here’s a list of the California Historical Landmarks I’ve come across:

#	Marker Name	City	County	Exact Location
001	Custom House	Monterey	Monterey	N 36.60346 W 121.89349
002	Portolá Journey’s End	Menlo Park	San Mateo	N 37.44790 W 122.17099
003	Mission San Francisco Solano	Sonoma	Sonoma	N 38.29367 W 122.45591
004	General M. G. Vallejo Home	Sonoma	Sonoma	N 38.29884 W 122.46254
005	Fort Ross	Fort Ross	Sonoma	N 38.51638 W 123.24651
006	Frémont's Camp	Tulelake	Siskiyou	N 41.85454 W 121.31447
007	Bear Flag Monument	Sonoma	Sonoma	N 38.29344 W 122.45672
008	Bloody Point		Modoc	N 41.95681 W 121.35476
009	Captain Jack's Stronghold	Tulelake	Siskiyou	N 41.82479 W 121.50035
010	Reading Adobe	Cottonwood	Shasta	N 40.39135 W 122.20040
011	Noble Pass Route	Manzanita Lake	Shasta	N 40.55814 W 121.53179
012	Residence of General William B. Ide	Red Bluff	Tehama	N 40.19648 W 122.22574
013	Guillem's Graveyard	Tule Lake	Siskiyou	N 41.82407 W 121.55694
027	First Camp After Discovery of San Francisco Bay	Millbrae	San Mateo	N 37.58895 W 122.41315
239	Mission San Luis Rey De Francia	Oceanside	San Diego	N 33.23211 W 117.31909
474	Town of Searsville	Woodside	San Mateo	N 37.40264 W 122.24520
503	First County Courthouse Site	Union City	Alameda	N 37.59671 W 122.08113
622	Harry Wade Exit Route	Renoville	San Bernardino	N 35.63315 W 116.29094
652	Mojave 20-Mule-Team Borax Terminus	Mojave	Kern	N 35.05692 W 118.17495
741	Bealville	Bealville	Kern	N 35.27185 W 118.62618
757	Caliente	Caliente	Kern	N 35.29041 W 118.62702
782	Town of Calico	Calico	San Bernardino	N 34.94881 W 116.86517
816	Union Cemetery	Redwood City	San Mateo	N 37.47268 W 122.22298
825	Casa De Tableta	Portola Valley	San Mateo	N 37.38235 W 122.19372
844	Hotel del Coronado	Coronado	San Diego	N 32.68042 W 117.17784
854	United States Post Office	San Jose	Santa Clara	N 37.33337 W 121.89023
868	Winchester House	San Jose	Santa Clara	N 37.31865 W 121.95079
892	Barstow Harvey House	Barstow	San Bernardino	N 34.90456 W 117.02472
909	Our Lady of the Wayside	Portola Valley	San Mateo	N 37.38444 W 122.23485
934	Fresno Assembly Center	Fresno	Fresno	N 36.73156 W 119.75072
963	Mojave Road	Yermo	San Bernardino	N 35.03172 W 116.47025
965	Point Dume (Dumé)	Malibu	Los Angeles	N 34.00119 W 118.80644
976	Birthplace Of Silicon Valley	Palo Alto	Santa Clara	N 37.44294 W 122.15459