Delaware. Find a US map. locate California, then the other states. It will be very apparent which one is the most distant.
California
Arizona's border with both Nevada an California is the Colorado River.
Arizona, Nevada
California's neighboring states are Oregon, Nevada, and Arizona.
Nevada,Oregon and Arizona are the ones right next to California
Both Nevada and Arizona border California. Utah and Ohio do not border California.
The Mojave Desert covers parts of California, Arizona, Nevada and Utah.
California, idaho, Utah, Arizona, and Oregon.
California, Idaho, Utah, Oregon, and Arizona border Nevada.
California, Nevada, Arizona, Utah, Wyoming, Colorado, and New Mexico.
Baja California, Mexico. Sonora, Mexico. California. Arizona. Nevada.
The state that borders Arizona, Nevada, and Idaho is Utah.