Union Hill, California

Empire Mine State Historic Park is a state-protected mine and park in the Sierra Nevada mountains in Grass Valley, California, U.S. The Empire Mine is on the National Register of Historic Places, a federal Historic District, and a California Historical Landmark. Since 1975 California State Parks has administered and maintained the mine as a historic site. The Empire Mine is "one of the oldest, largest, deepest, longest and richest gold mines in California". Between 1850 and its closure in 1956, the Empire Mine produced 5.8 million ounces (165 tons) of gold, extracted from 367 miles (591 km) of underground passages.

Badger Hill is the name of two historic mining areas in Nevada County. The first to be established, in August 1849, was located just east of Grass Valley, approximately where the narrow gauge railroad's Grass Valley station was later located. It appears to have been quickly incorporated into Grass Valley. The second was established around 1853, about 15 miles northeast of Grass Valley, 1 mile north of Cherokee and just south of the Middle Yuba River. It adopted its own mining laws in March 1854. Hydraulic mining predominated with the arrival of ditch water. It had a number of successful mines, some of which operated into the 20th century. The English Company and the Badger Hill Gold Mining Company were among the principal mines. The mines abutted those of Cherokee to the south, and Cherokee seems to have served the Badger Hill miners as a commercial and social center.

Cedar Ridge is an unincorporated community in Nevada County, California, United States, along State Route 174 2.5 miles (4.0 km) east/southeast of Grass Valley, California. and approximately 1 mile (1.6 km) east/southeast of the Empire Mine in Gold Country. The first Post Office was established in 1948 and the zip code is 95924.

Hills Flat is an unincorporated community in Nevada County, California. It lies at an elevation of 2457 feet (749 m). Hills Flat is 0.5 miles (0.8 km) northeast of Grass Valley.

The Diocese of Grass Valley (Latin: Dioecesis Vallispratensis) now a titular see, was formerly a residential diocese of the Catholic Church located in northeastern California, United States. The diocese also included most of Nevada, and, early in its history, Utah and part of Colorado.

Grass Valley is a city in Nevada County, California, United States. Situated at roughly 2,500 feet (760 m) in elevation in the western foothills of the Sierra Nevada mountain range, this northern Gold Country city is 57 miles (92 km) by car from Sacramento, 64 miles (103 km) from Sacramento International Airport, 88 miles (142 km) west of Reno, and 143 miles (230 km) northeast of San Francisco. As of the 2010 United States Census, its population was 12,860.

On April 19, 1865, Secessionists skirmished with 25 troopers of the 1st California Cavalry Battalion in Grass Valley, California in the wake of the assassination of Abraham Lincoln.

Grass Valley Pioneer Jewish Cemetery, also known as Shaar Zedek (English: Gate of Righteousness) is a no longer active Jewish cemetery founded in 1856 by the Hebrew Benevolent of Society of Grass Valley, and is located in Grass Valley, California, U.S. The last burial happened in 1891. It is a private site operated by the Commission for the Preservation of Pioneer Jewish Cemeteries and Landmarks in the West and is not open to the public.

Grass Valley Charter School is a K–8 charter school in Grass Valley, California, USA, part of Grass Valley School District. It was the first charter school in that part of Nevada County.

KNCO (830 kHz) is a commercial AM radio station in Grass Valley, California. It is owned by Nevada County Broadcasters and airs a news/talk radio format. The studios and offices for KNCO and KNCO-FM are on East Main Street in Grass Valley. The station streams its programming on the iHeartRadio platform and app. KNCO is a Class B radio station operating with 5,000 watts. AM 830 is a United States clear-channel frequency. So KNCO must use a directional antenna during nighttime hours to prevent interference with the skywave signal of WCCO in Minneapolis, Minnesota, the Class A station on the frequency. The transmitter is off Greenhorn Road in Grass Valley.

Kres is an unincorporated community in Nevada County, California. It lies at an elevation of 2861 feet (872 m). Kres is located on the Nevada County Narrow Gauge Railroad, 3 miles (4.8 km) east-southeast of Grass Valley.

Spring Hill is an unincorporated community in Nevada County, California. Spring Hill is located 1.25 miles (2.0 km) northeast of Grass Valley. It lies at an elevation of 2674 feet (815 m).