Quien Sabe Valley, originally known as Cañada de Quién Sabe, is a valley in the Diablo Range in San Benito County, California.
It runs from its mouth, at an elevation of 1,572 feet (479 meters), to its head at 36°53′46″N 121°12′44″W / 36.89611°N 121.21222°W / 36.89611; -121.21222 at an elevation of 1,800 feet (550 meters).
The valley is drained by Quién Sabe Creek, ultimately a tributary to the Pajaro River to the northwest.
[1] Quien Sabe Valley is the location of the Rancho Santa Ana y Quién Sabe.
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