Happy Valley, Calaveras County, California

The Hotel Léger, in Mokelumne Hill, California is one of the oldest hotels still operating in California. The hotel and courthouse building are registered as California Historical Landmark #663, and located in present-day Calaveras County, California.

The I.O.O.F. Hall in Mokelumne Hill, California, which is California Historical Landmark #256, is said to be California's first three-story building to be erected outside the coastal towns. The original building was erected in 1854 as a two-story building. A third story to be used for lodge purposes was added in 1861. According to a local website: "The I.O.O.F. Hall is a grand survivor. Built after the first fire in 1855, the building was sold to the Odd Fellows in 1860. The organization immediately began construction of a third story. The Odd Fellows celebrated their feat—constructing the first three-story stone building in California—with a grand ball. Tickets were $6, plus $1.50 for dinner. Some may have grumbled at the price, but the whole town attended. Little has changed. The I.O.O.F. Hall is still party central. The first floor houses the Hole in the Wall, one of the Foothills' liveliest bars."

Mokelumne Hill (Mokelumne, Miwok for "People of the Fish Net") is a census-designated place (CDP) in Calaveras County, California, United States. The population was 646 at the 2010 census, down from 774 at the 2000 census. It is commonly referred to as "Moke Hill" by locals. The town takes its name from the neighboring Mokelumne River, which in turn is Miwok for the "people of Mokel," the likely name of a Native American village in the area.

Mokelumne Hill Congregational Church, now Mokelumne Hill Community Church, is a historical building in Mokelumne Hill, California in Calaveras County built in 1856. The Congregational Church was founded on August 28, 1853. The first church building built in 1853 was lost in a fire in 1854. Mokelumne Hill Congregational Church is the fifth Congregational Church founded in California. The 1856 building was built by Pastor J. S. Zellie at a cost of $2,700. The funds for the building were donated by miners and fundraising of the women of the congregation. The new church was dedicated on March 8, 1857, by Pastor Joseph Benton of Sacramento. The church has a stone foundation and was built using wood board and batten. The Church's windows were imported by ship from the East Coast of the United States that sailed around the Straits of Magellan of South America. The name of the church changed in 1959 when it was incorporated to the Mokelumne Hill Community Church. The historical building and the church are open and visitors are welcome on Wednesdays at 7 pm and Sundays at 9:30am. The Church is California Historical Landmark No. 261

The Big Bar, also called Upper Bar, is a gold mine in Jackson, California, United States. The mine opened in 1848 along the Mokelumne River and is registered as California Historical Landmark #41. The jackpot mine sprung up a town quickly for the prospectors and those who served them. An old inn is all that remains of the town. A Whaleboat ferry ran across the river from 1848 until 1852 when a new bridge was built by Soher & Parrish. A newer bridge is at the spot of the original bridge. In 1856, Dr. L. Soher opened a toll road, now called the Old Toll Road, from the city of Mokelumne Hill to the bridge. A 1862 flood washed away the Soher' bridge, so he opened a new ferry, till a new bridge was built. North of the site is the city of Butte City, Butte Store is a California Historical Landmark No. 39. The Big Bar site today is the Bureau of Land Management (BLM), Big Bar Launch Facility, on the Mokelumne River Whitewater Trail. While the Historical listing is in Amador County, the Big Bar site is also in Calaveras County across the river.

Jesus Maria (Spanish: Jesús María) is an unincorporated community in Calaveras County, California. It lies at an elevation of 1043 feet (318 m) and is located at 38°17′08″N 120°38′51″W. The community is in ZIP code 95222 and area code 209. The community, the center of a large placer mining section, was named for a Mexican who raised vegetables and melons for the miners. It was settled in the early 1850s with a large population of Mexicans, French, Chileans, and Italians. Now it is only populated by a few families who live together and work for common goals, including a large community garden, basketball court, jungle gym for children, and a windmill to pump water. Jesus Maria is registered as California Historical Landmark #284.

Middle Bar is a former mining town on the Mokelumne River in Amador County, California. It is a California Historical Landmark.

Clinton (formerly, Sarahville, Sarahsville, and Lincoln) is a small town in Amador County, California. It is located 2.5 miles (4.0 km) south of Pine Grove, at an elevation of 1972 feet (601 m). Clinton was the center of a placer mining community during the 1850s and of quartz mining as late as the 1880s. This town once decided Amador County elections as its votes were always counted last. Clinton is registered as a California Historical Landmark. A post office operated at Clinton from 1856 to 1859. Nowadays, Clinton is a picturesque little town made up of an assemblage of homes and historic buildings around the center of town. It has a population of about 45.

Chili Gulch (also spelled Chile Gulch) is a gulch in Calaveras County, California. This five-mile gulch was the richest placer mining section in Calaveras County. It received its name from Chileans who worked it in 1848 and 1849, and was the scene of the so-called Chilean War. The largest known quartz crystals were recovered from a mine on the south side of the gulch. Chili Gulch is registered as California Historical Landmark #265.

Paloma (Spanish for "dove"; formerly, Fosteria and Frenchman's Ranch) is an unincorporated community in Calaveras County, California. It lies at an elevation of 1362 feet (415 m) and is located at 38°15′34″N 120°45′48″W. The community is in ZIP code 95252 and area code 209. Gwin Mine, Paloma, and Lower Rich Gulch were mined for placer gold in 1849, and quartz was discovered by J. Alexander in 1851. Property here was acquired by William M. Gwin, California's first U.S. Senator, in 1851. After yielding millions of dollars in gold, the Gwin Mine closed in 1908. The town today is registered as California Historical Landmark #295. The town's post office operated from 1903 to 1918, when the name was Fosteria - from the Foster family, early pioneers.

Irishtown (also, Irish Town) is a former settlement in Amador County, California, United States. It was located 1.5 miles (2.4 km) south-southwest of Pine Grove, at an elevation of 1972 feet (601 m). The townsite lies within the boundaries of Pine Grove. Irishtown is a former Miwok settlement.

Jackson Rancheria is the landbase for the Jackson Band of Miwuk Indians, a federally recognized tribe of Miwok people, located near Jackson, California. It is located in Amador County, about midway between Jackson and Pine Grove. The reservation operates the Jackson Rancheria Casino Resort, located on its territory.