Oregon to the North, Nevada and Arizona (along the Colorado River) to the East, Mexico to the South, and the Pacific Ocean to the West.
California's southern border is shared with the country of Mexico.
The Colorado River forms the border between California and Arizona.
California's eastern border and Arizona's western border.
The pacific ocean.
The Colorado River forms the border between Arizona and California
The Colorado River forms the western boundary between Arizona and California
The Colorado River.
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The Colorado River forms the border between Arizona and California.The Colorado River.
The Colorado River.
That would be the Colorado river.
the Colorado river