Elkhorn Grade Road is an approximately six-mile dirt surfaced rural highway which originates in Carrizo Plains National Monument. The grade begins at Elkhorn Road in San Luis Obispo County and enters Kern County where it crests at an elevation of 1,807 feet above sea level in the Temblor Range. The remaining balance of the grade continues east/northeast to California State Routes 166 and 33 near Maricopa.
Elkhorn Grade Road was one of two roadways used by the Carrisa Chemical Company to haul freight out of Soda Lake. The corridor appears as a prominent highway on early United States Geological Survey maps dating back to 1910.
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