Summit Valley (San Bernardino County, California)

Deep Creek is a tributary of the Mojave River, 23.4 miles (37.7 km) long, in San Bernardino County, California.

West Fork Mojave River is a tributary stream of the Mojave River in the San Bernardino Mountains of San Bernardino County, California. Its mouth lies at an elevation of 2,986 feet (910 meters) at its confluence with Deep Creek, together the source of the Mojave River. The source of the West Fork is at 34°15′52″N 117°24′01″W at an elevation of 4,960 feet, on the north side of a saddle between summits on a ridge running west northwest of Sugarpine Mountain. Sawpit Canyon Creek and East Fork of West Fork Mojave River are its tributaries, both of which now feed into Silverwood Lake that was created when the West Fork was obstructed by the Cedar Springs Dam in 1971.

The Mojave Forks Dam, most often known as the Mojave River Dam, is an earth-fill dry dam across the Mojave River in San Bernardino County, California in the United States. Completed in 1974 by the U.S. Army Corps of Engineers (USACE), the dam is located at the confluence of the West Fork Mojave River and Deep Creek, and can store approximately 179,400 acre⋅ft (221,300,000 m3) of water.

Horsethief Canyon, is a canyon comprising the upper part of the Summit Valley in San Bernardino County, California. Its head lies at 34°19′33″N 117°25′38″W at an elevation of 3,800 feet just east of the summit of Cajon Pass, and its mouth at an elevation of 3,123 feet / 952 meters. California State Routes 138 and 173 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. It is located in the Cleveland National Forest, in the Pine Creek Wilderness.

The Pilot Fire was a wildfire that burned near Silverwood Lake in San Bernardino County, California. The fire started at about 12:10 pm on Sunday, August 7, 2016, near the Miller Canyon OHV area off California State Route 138. The name "Pilot" refers to where the fire was first reported: the Pilot Rock Conservation Camp, a minimum-security prison camp/fire camp consisting of inmates trained for firefighting.The fire was under the management of the United States Forest Service in Unified Command with the California Department of Forestry and Fire Protection (CAL FIRE), the San Bernardino County Fire Department, and the San Bernardino County Sheriff's Department. The estimated full containment date was by 6:00 AM (PST) on August 16, 2016 and burned a total of 8,110 acres. On March 1, 2017 six months after the fire, fire investigators with the San Bernardino National Forest determined the cause was by a vehicle on fire.

Silverwood Lake is a large reservoir in San Bernardino County, California, United States, located on the West Fork Mojave River, a tributary of the Mojave River in the San Bernardino Mountains. It was created in 1971 (1971) as part of the State Water Project by the construction of the Cedar Springs Dam as a forebay on the 444 mi (715 km) long California Aqueduct (consequently inundating the former town of Cedar Springs), and has a capacity of 73,000 acre⋅ft (90,000,000 m3).

East Fork of West Fork Mojave River is a tributary stream of the West Fork Mojave River, itself a tributary of the Mojave River, in the San Bernardino Mountains of San Bernardino County, California. Its mouth originally was at its confluence with the West Fork Mojave River which is now submerged under Lake Silverwood. It now lies at an elevation of 3,376 feet/1,029 meters at its confluence with that lake. The source of the East Fork is at 34°15′11″N 117°14′24″W at an elevation of 5,500 feet in Twin Peaks, California.

Hesperia is a city in San Bernardino County, California, United States. It is located 35 miles (56 km) north of downtown San Bernardino in Victor Valley and surrounded by the Mojave Desert. Because of its relatively high elevation and the unique and moderate weather patterns of the region, Hesperia is part of what is locally called the High Desert. The name "Hesperia" means "western land". The 2019 census report estimates that the city has a population of 95,750.

Sawpit Canyon is a steep valley or canyon in the San Bernardino Mountains of San Bernardino County, California. Its mouth is at an elevation of 3,386 feet (1,032 meters). Its source is located at 34°14′43″N 117°20′56″W and lies at an elevation of 5,100 feet, just east of Monument Peak. Its creek was a tributary of the West Fork Mojave River, its original mouth now under Silverwood Lake.

Camp Seeley' was a United States Army World War II training camp near El Centro, California in the Imperial Valley. At Camp Seeley was: the Camp Seeley Combat Firing Range, Camp Seeley Ordnance Desert Proving Ground and Camp Seeley Ordnance Training Center. The 17,574 acres Camp Seeley was 10 miles northwest of the City of El Centro, near the city of Seeley, California. The town is named after Henry Seeley, a pioneer of the Imperial Valley. The camp was north of what is now California State Route 98. The tent camp, in the Yuha Desert, opened November 1940, first based at the camp was the 11th Cavalry Regiment, the troops and Army horse came from the Presidio of Monterey, California. At the camp the 11th Cavalry Regiment took part in desert training and teaching horses to swim across rivers with rider. 11th Cavalry Regiment moved to Camp Lockett at Campo, California in December 1941. The 11th and 28th Cavalry Regiment also trained at the camp, along with the 75th Horse Field Artillery Battalion. In 1942 Camp Seeley was converted to a US Army ordnance proving ground. While the camp is closed the area of Camp Seeley the home of the Historical "The Colonel's Own." 11th Cavalry Horse Honor Guard. The US Army Quartermaster Test Command opened the Desert Test Command Headquarters in March 1942 at Camp Seeley. The ordnance proving ground job was to test armed vehicles, tanks, and trucks and jeeps. Camp Seeley had sand terrain and high temperatures for these tests. Live fire tests were not done at Camp Seeley, as live fire test was done in the nearby vast Desert Training Center. The camp was transferred to the US Army Ordnance Department in August 1942, later renamed Ordnance Desert Proving Ground. The camp was closed on 18 April 1946 and returned to the Department of the Interior. The former camp is now run by the currently a Bureau of Land Management for off-road vehicle use.

Lake Gregory is a reservoir in the San Bernardino National Forest of the San Bernardino Mountains in San Bernardino County, California. The lake and the surrounding area make up the Lake Gregory Regional Park adjacent to Crestline, California. The area, originally known as Houston Flat, was developed by and named for its developer, Redlands citrus grower Arthur Gregory, Sr. Gregory bought and developed land in an area known today as Valley of the Moon. He erected a sawmill at Valley of the Moon to cut wood for crating his "Orange Blossom" brand of citrus fruit. Gregory was also instrumental in creating the Crest Forest County Water District (CFCWD), which, in turn, was necessary to acquire federal aid in order to develop the area. Although the lake is in Crestline proper, Crestline is not a part of the Crest Forest District, but rather the Crestline Water District, which purchases water from CFCWD. Work began in 1937 under a Works Progress Administration (WPA) grant to dam the east and west forks of Houston Creek, whose waters drained into tributaries of the Mojave River, thereby "going to waste". The project was nearly completed by March 1938, but federal funds had run out. Gregory financed the completion of the project, lending money to the district for the completion. The eventual cost was US$225,000, of which US$160,000 came from the federal government, with the balance funded by the water district. Heavy rains that March put the dam to its first test. It had been estimated that it would take three years to fill the lake. So heavy were the rains that the lake filled in only three days. An unconfirmed, but plausible urban legend claims that the construction equipment left on the lake bed in 1938 during the rains remains at the bottom of the lake today. A road built over the dam (present-day Lake Drive) completed the project in January 1939. Today, the Lake Gregory Recreational Park with swimming and water slides is at the west end of the lake and a walking trail encircles the lake. The south shore of the lake is a popular fishing destination. The regional park is the site of Crestline's Independence Day celebration. The southeast shore is the site of the private beach and Tyrolean-styled clubhouse of the San Moritz Lodge, once known as Club San Moritz. The original club was built in the Valley of the Moon in 1926 along the shore of now-drained Moon Lake, today the site of Lake Gregory Community Church. A fire of suspicious origin destroyed the building in 1950 and the lake was drained in the early 1960s over increasing problems with mosquitoes. The new club, built along Lake Gregory in 1950, was intended to be a members-only resort and club for property owners in the area. Today, the only remaining buildings are the restaurant, used as the site of special events such as weddings, and a bathhouse, now used as a senior center. Private vessels and power boats are not allowed on Lake Gregory, although rowboats, paddle boards, pedal-powered "water trikes" and paddle boats are available for rental. The rowboats may be affixed with the renter's own electric trolling motor. From 2011 to 2013, the park experienced operating losses of $1.4 million. In 2014, the San Bernardino County partnered with The California Parks Company, now named Basecamp Hospitality, after six years of decline due to the flagging economy. In 2018, San Bernardino County put the concessionaire contract up for bid to find a new managing company for Lake Gregory. Basecamp Hospitality won the bid as the only concessionaire applying, but struggled to come to financial terms with the longterm contract and renewed a two-year agreement instead. In 2019, San Bernardino County ended its relationship with Basecamp Hospitality. The California Office of Environmental Health Hazard Assessment (OEHHA) has developed a safe eating advisory for Lake Gregory based on levels of mercury found in fish caught from this water body.

Deep Creek Hot Springs, DCHS, are natural hot springs located in the northern Mojave Desert section of the San Bernardino National Forest, near Hesperia in San Bernardino County, Southern California.