It depends on what you are asking that is closest to California. The closest state would be Oregon, but that's depending on where you live! Hope this helps! Try to be more specific next time!
The closest beach to Glendale California is at Santa Monica.
The closest major airport to Carmel, California is Monterey Peninsula Airport (MRY / KMRY).
Lassen
Alaska is closer to Washington.
The closest he came to California was Oregon.
The closest major airport to Eureka, California is Arcata-Eureka Airport (ACV / KACV).
The closest major airport to Windsor, California is Charles M. Schulz - Sonoma County Airport (STS / KSTS). This airport is in Santa Rosa, California.
California shares a border with:OregonNevadaArizonaIt also shares a border with Baja California, a state in Mexico.
you
Alameda
arizona
South Africa