Hollenbeck Canyon Wildlife Area

Rancho Jamul was a 8,926-acre (36.12 km2) Mexican land grant in present-day San Diego County, California given in 1829 by Mexican Governor José María de Echeandía to Pío Pico. In 1831 Governor Manuel Victoria reconfirmed the grant to Pío Pico. The grant extended from present day Jamul southeast to Dulzura. It is currently the 5,600-acre Rancho Jamul Ecological Reserve, operated by the California Department of Fish and Wildlife.

The Mountain Empire is a rural area in southeastern San Diego County, California. The Mountain Empire subregion consists of the backcountry communities in southeastern San Diego County. The area is also sometimes considered part of the East County region of San Diego County.

Lyons Peak is a prominent mountain in San Diego County, California. The top of the mountain is enclosed in an almost rectangular patch of the Cleveland National Forest. An old fire lookout tower is located at the peak. Lyons Peak is located on restricted land and trespassing is prohibited. The peak's toponym honors Nathaniel Lyon (1818–1861). As an army captain, he passed by the peak in 1851 while scouting a new route east to the desert.

McGinty Mountain is a gabbroic mountain located in San Diego County, California near Jamul. Because of the gabbroic soil, the mountain supports numerous rare and endemic plant species, including half of California's population of the Dehesa nolina (Nolina interrata). The mountain belongs to an ecological preserve collectively managed by The Nature Conservancy, the California Department of Fish and Wildlife, and the San Diego National Wildlife Refuge. The mountain is accessible through a 4.7 mi (7.6 km) long out-and-back hiking trail.

The Jamul Casino is a Native American gambling enterprise run by the Jamul Indian Village on their 6-acre reservation in Jamul, California. It was formerly the Hollywood Casino Jamul-San Diego. The president and general manager is Mary Cheeks.The casino has 1,700 slot machines and 40 table games. It is located 20 miles east of downtown San Diego.

The Jamul Indian Village of California is a federally recognized tribe of Kumeyaay Indians, who are sometimes known as Mission Indians.

Cedar Canyon is a valley of the San Ysidro Mountains in San Diego County, California, extending from the northern slopes of Otay Mountain in the south to Otay Lakes Road in the north. Part of it is in the Otay Mountain Wilderness.

Jamul (; Kumeyaay: Ha-mul, meaning "sweet water") is a census-designated place (CDP) in San Diego County, California, United States. Jamul had a population of 6,163 at the 2010 census. Jamul suffered from the Valley Fire, one of the 2020 California wildfires.

The Jamul Mountains are a mountain range of the Peninsular Ranges System. They are located in southernmost San Diego County, Southern California. The Mexico–United States border is nearby to the south. There is a trail starting at Upper Otay Lake that leads over the western part of the range.

Loveland Dam (also called Sweetwater Falls Dam) is a dam across the Sweetwater River in San Diego County, California. The dam forms long, narrow Loveland Reservoir which stores 25,387 acre-feet (31,314,000 m3) of water. It is operated primarily for flood control and municipal water storage in conjunction with downstream Sweetwater Dam but the reservoir is also open to the public for fishing.The dam stands 203 feet (62 m) high and spans 765 feet (233 m) across the narrow gorge of the Sweetwater River, 2.4 miles (3.9 km) south of Alpine. It is built entirely of concrete and has a thin arch design. Loveland is the younger of the two dams on the Sweetwater River; the other, Sweetwater, was built in 1888 while Loveland was only constructed in 1945. It is named after Chester H. Loveland, president of the California Water and Telephone Corporation, the firm that built it. The Loveland Reservoir is considered a better water storage facility than Sweetwater because of its much smaller surface area (454 acres compared to 960) and comparable capacity, thus it is less vulnerable to evaporation.

The San Ysidro Mountains are a mountain range in southern San Diego County, California, and Baja California, Mexico. The mountains are a rugged coastal foothill range of the Peninsular Ranges system. Major peaks include the highest summit of the range, Otay Mountain, and the Cerro San Isidro which forms the southern extrusion of the range on the Mexican side of the border. The majority of the range is within the Otay Mountain Wilderness area, in the United States.

Dehesa is a populated place in San Diego County, California. Dehesa is located along the Sweetwater River and Dehesa Valley between Harbison Canyon, Crest, Alpine, and Granite Hills. Dehesa is a mainly agricultural community. It is served by the Dehesa School District, which consists of one school serving grades kindergarten through 8. It is located in the 53rd Congressional District of California.The reservation of the Sycuan Band of the Kumeyaay Nation runs along the border of Dehesa. Dehesa is also the home of the Sycuan Casino.