The Terra Bella-Lost Hills area in the southeastern part of the San Joaquin Valley includes about 1,700 square miles of Kings, Tulare and Kern Counties. This part of the San Joaquin Valley has mild winters, long hot summers, and little precipitating, almost all of which occurs during the fall and winter months. The area is a basin of interior drainage and the streams are tributary to Tulare Lake.
The Terra Bella-Lost Hills area is characterized by dissected uplands, low alluvial plains and fans, river-flood plains and channels, and overflow land. and. lake bottoms.