The Guijarral Hills are a range of low hills in the inner

California Coast Ranges The Coast Ranges of California span from Del Norte or Humboldt County, California, south to Santa Barbara County. The other three coastal California mountain ranges are the Transverse Ranges, Peninsular Ranges and the Klamath Mountains. P ...

, in

Fresno County Fresno County (), officially the County of Fresno, is a county located in the central portion of the U.S. state of California. As of the 2020 Census, the population was 1,008,654. The county seat is Fresno, the fifth-most populous city in Cali ...

California California is a U.S. state, state in the Western United States, located along the West Coast of the United States, Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the List of states and territori ...

, about seven miles east of the town of

Coalinga Coalinga ( or ) is a city in Fresno County and the western San Joaquin Valley, in central California about 80 miles (128 km) southeast of Salinas. It was formerly known as ''Coaling Station A'', ''Coalingo'', and ''Coalinga Station''. The ...

. Guijarral is derived from a Spanish word meaning "heap of pebbles". They are the surface expression of an

anticlinal Anticlinal may refer to: *Anticline, in structural geology, an anticline is a fold that is convex up and has its oldest beds at its core. *Anticlinal, in stereochemistry, a torsion angle between 90° to 150°, and –90° to –150°; see Alkane_st ...

structure which continues to the south as the

Kettleman Hills The Kettleman Hills is a low mountain range of the interior California Coast Ranges, in western Kings County, California. It is a northwest–southeast trending line of hills about 30 miles long which parallels the San Andreas Fault to the west. ...

, and to the north as Anticline Ridge, a portion of the huge

Coalinga Oil Field The Coalinga Oil Field is a large oil field in western Fresno County, California, in the United States. It surrounds the town of Coalinga, about halfway between Los Angeles and San Francisco, to the west of Interstate 5, at the foot of the Diablo ...

. The Guijarral Hills overlie the smaller and mostly exhausted

Guijarral Hills Oil Field The Guijarral Hills Oil Field is a formerly-productive oil and gas field near Coalinga on the western side of the Central Valley in central California in the United States. Discovered in 1948, and having produced of oil during its peak year in ...

. Jayne Avenue, which connects Interstate 5 to Coalinga, is the major east–west road through the hills.

References

Mountain ranges of Southern California Mountain ranges of Fresno County, California California Coast Ranges Geography of the San Joaquin Valley {{FresnoCountyCA-geo-stub