Horsethief Canyon, is a canyon comprising the upper part of the Summit Valley in

San Bernardino County, California San Bernardino County (), officially the County of San Bernardino, is a county located in the southern portion of the U.S. state of California, and is located within the Inland Empire area. As of the 2020 U.S. Census, the population was 2,181, ...

. Its head lies at at an elevation of 3,800 feet just east of the summit of

Cajon Pass Cajon Pass (; Spanish: ''Puerto del Cajón'' or ''Paso del Cajón'') is a mountain pass between the San Bernardino Mountains to the east and the San Gabriel Mountains to the west in Southern California. Created by the movements of the San Andr ...

, and its mouth at an elevation of . California State Routes 138 and

173 Year 173 ( CLXXIII) was a common year starting on Thursday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Severus and Pompeianus (or, less frequently, year 926 ''Ab urbe c ...

pass through it. There is also a separate Horsethief Canyon in San Diego County, California, near Pine Valley, California and the

Mexico–United States border The Mexico–United States border ( es, frontera Estados Unidos–México) is an international border separating Mexico and the United States, extending from the Pacific Ocean in the west to the Gulf of Mexico in the east. The border trave ...

. It is located in the

Cleveland National Forest Cleveland National Forest encompasses 460,000 acres (), mostly of chaparral, with a few riparian areas. A warm dry mediterranean climate prevails over the forest. It is the southernmost U.S. National Forest of California. It is administered by ...

, in the

Pine Creek Wilderness Pine Creek Wilderness is a wilderness area designated by Congress in 1984. It is located entirely in California, and managed by United States Forest Service as part of the Cleveland National Forest. The wilderness is a sloping area of , ranging f ...

References

{{Authority control Valleys of San Bernardino County, California