THE FIRST DISTRICT of San Bernardino County is the largest of five supervisorial districts

THE FIRST DISTRICT of San Bernardino County is the largest of five supervisorial districts with 19,205 square miles, accounting for 95 percent of the County's geographical area. It includes the San Bernardino Mountains with the communities of Big Bear, Crestline, Fawnskin, Green Valley, Lake Arrowhead, Twin Peaks, and Running Springs, and the desert region with the unincorporated communities of Amboy, Baker, Morongo Valley, Lucerne Valley, Trona, Twentynine Palms, Yermo, Dagget, Yucca Valley, Joshua Tree and Helendale. Its incorporated cities are Adelanto, Apple Valley, Barstow, Needles, Big Bear Lake, and Victorville. The First District has a population of roughly 190,534 people.

Transportation still plays an important part of the First District's economy with Santa Fe Railway Company's rail car transfer station (Hump Yard) at Barstow, Union Pacific Classification Yard at Yermo, Yellow Freightlines in Barstow and Roadway Freight Company in Adelanto. Interstate Highway 15 and 40 are the main arteries carrying motor vehicles into and out of the District, with Highways 395 from Victorville and 58 from Barstow linking the Northern California areas.

The District's military bases include Fort Irwin, the Army's National Training Center, the U. S. Marine Corps Logistics Center at Barstow and Training Center at Twentynine Palms.

Tourists are attracted to the District's mountains and desert for a variety of activities, ranging from snow skiing in the winter to water skiing along the Colorado River. Fishing can be enjoyed at Lakes Arrowhead, Gregory, Silverwood, Big Bear, and many of the man made lakes. Five County regional parks lie within the First District (Calico, Moabi, Lake Greory, Morongo, and Mojave Narrows), truly a land to appeal to every age and interest.