WRONG:

SIERRA NEVADA MOUNTAINS

RIGHT:

SIERRA NEVADAS

Sierra is Spanish for “sawtooth mountain range,” so knowledgeable Westerners usually avoid a redundancy by simply referring to “the Sierra Nevadas” or simply “the Sierras.” Transplanted weather forecasters often get this wrong.

Some object to the familiar abbreviation “Sierras,” but this form, like “Rockies” and “Smokies” is too well established to be considered erroneous.

List of errors