Northern California Baseball Association ended in 1984.
California Cured Fruit Association ended in 1903.
Southern California Sun ended in 1975.
Senior Professional Baseball Association ended in 1990.
California Southern Railroad ended in 1889.
National Association of Professional Base Ball Players ended in 1875.
the klamath river that i know of is at both southern Oregon and northern California. it started from the southern end of lake ewauna in southern Oregon, flowing southwest into northern California and eventually, into the pacific ocean.
California was acquired from Mexico at the end of the Mexican-American War (1846-1848). Since then, southern California has been part of the US-Mexico Border.
Mountain View is technically in "northern California", but in reality is pretty much in the middle between north and south. Mountain View is a suburb of San Jose, at the southern end of San Francisco Bay.
Autonomist Association ended in 1914.
Courteen association ended in 1657.
Union Association ended in 1884.