The Guijarral Hills are a low range of hills, rising a little more than a hundred feet above the floor of the San Joaquin Valley to the east, and scarcely noticeable in the shadow of the nearby Coast Range of central California. These low hills are the surface expression of the southern portion of the Coalinga Anticline, which separates the smaller, largely agricultural Pleasant Valley to the west from the main portion of the California Central Valley to the east. The town of Coalinga is about eight miles (13 km) west of the hills, with the large Coalinga Oil Field wrapping around the town in a crescent shape. The Guijarral field is a similar, smaller, and separate field southeast of the giant Coalinga field.