Rowher Flat OHV – The Forest Service, in cooperation with Los Angeles County and the State of California, actively manages the 10,000-acre Rowher Flat Off-Highway Vehicle Recreation Area. It has been popular with OHV recreationists since the early 1960s. Current management is designed to be responsive to environmental needs yet pro­vide you with an excellent opportunity to enjoy the area when using your off-highway vehicles. Use at Rowher Flat spans several thousand years into prehistory. Local springs and a diverse land­scape provided sufficient water and food to sup­port a Tataviam Indian village on the flats. Ranching, mining, and World War II-aircraft-landing training has also occurred in the area. The closed areas you may encounter as you ride have been set aside to preserve these irreplace­able remnants of our cultural heritage. Being under the influence or possessing an alcoholic beverage open container while operating or riding in a vehicle is prohibit­ed.