Rail Road Flat, California

Wilseyville is an unincorporated community in Calaveras County, California. It lies at an elevation of 2769 feet (844 m). Wilseyville's post office was established in 1947; it has the zip code 95257. Wilseyville was named after Lawrence A. Wilsey, an executive at the American Forest Products Company.Wilseyville is notorious for being the location of the cabin where serial killers Leonard Lake and Charles Ng killed and disposed of some of their victims. Their spree ended in June 1985, when Ng was spotted loading stolen merchandise into a car driven by Lake in South San Francisco. Ng fled, but Lake was arrested at the scene for illegally outfitting a .22 caliber pistol with a silencer. He swallowed a cyanide pill while in police custody and died four days later. Police found human remains and other evidence at the Wilseyville cabin and began a manhunt for Ng. He was arrested in Canada for shoplifting and was extradited to the United States after serving a sentence in Canada. Ng was sentenced to death after being found guilty on 11 of 12 counts of murder. It was later ruled that Lake and Ng were responsible for the 12th victim, though they are thought to have killed as many as 25 people.

Sandy Gulch is a small community in Calaveras County, California, just southwest of West Point on State Route 26. It lies at an elevation of 2592 feet (790 m) above sea level and is located at 38°22′49″N 120°31′58″W. The community is in ZIP code 95248 and area code 209. It was established in 1849 as a trading center for miners of the area. The settlement, in an area that was home to many Miwok Indians, was named after the gulch where William and Dan Carsner found large nuggets of gold embedded in the coarse sands. Water for mining was brought from the middle fork of the Mokelumne River through Sandy Gulch and Kadish Ditches. Quartz mining began in the early 1850s, and the first custom stamp mill in the district was located at the head of Sandy Gulch. School and election precincts were established early, and one of California's many Hangman's Trees stood near the center of town. It is registered as California Historical Landmark #253.Sandy Gulch is marked by a cluster of homes surrounding the town baseball field. Sandy Gulch is also home to several small home businesses. As of 2016, its population was around 42.

West Point (formerly, Indian Gulch and Westpoint) is a census-designated place (CDP) in Calaveras County, California, in the United States. As of the 2010 United States Census, West Point's population was 674, down from 746 as of the 2000 census. The town is registered as California Historical Landmark #268. There is an annual West Point Lumberjack Days festival in the community.

Bummerville is an unincorporated community in Calaveras County, California, about 1 mile east of West Point. It has frequently been noted on lists of unusual place names. It lies at an elevation of 898 m (2946 ft) and is located at 38°24′05″N 120°30′21″W. Bummerville was known historically for its gold and tungsten mining operations. It once had a school, hotel, blacksmith shop, and several boarding-houses. Today, the community consists mostly of residences on Bummerville Road.

Glencoe (formerly, Mosquito and Mosquito Gulch) is an unincorporated community in Calaveras County, California. It lies at an elevation of 2,749 feet (838 m) and is located at 38°21′15″N 120°35′06″W. The community's ZIP code is 95232. Glencoe was formerly called Mosquito Gulch. The business portion of the town was on the north side of Mosquito Gulch, but not one of the old buildings remains. The mines were first worked by Mexicans in the early 1850s. Quartz mining predominated but there was some placer mining as well. The town today is registered as California Historical Landmark #280.The first post office was opened at Mosquito in 1858 but closed in 1869; it was re-established as Mosquito Gulch in 1873. The name was changed to Glencoe in 1912; the post office closed again in 1916, but was re-established in 1947.

Pioneer is a census-designated place in Amador County, California. It is located 5 miles (8.0 km) east-northeast of Pine Grove, at an elevation of 2986 feet (910 m), along State Route 88. The community is in ZIP code 95666 and area code 209. The population was 1,094 at the 2010 census. Pioneer Station, built approximately 1925, is located in Pioneer however, it was never a Pony Express stop, a popular fallacy. It was a general store selling gas, water, and offering camping sites. The old Pioneer Station still stands and is currently a private residence. A post office opened in Pioneer in 1947.

Buckhorn is a census-designated place in Amador County, California. Buckhorn sits at an elevation of 3,238 feet (987 m). The community is in ZIP code 95666 and area code 209. The 2010 United States census reported Buckhorn's population was 2,429.

Red Corral is a census-designated place in Amador County, California. Red Corral sits at an elevation of 2710 feet (826 m). The 2010 United States census reported Red Corral's population was 1,413.

Mountain Ranch (formerly, El Dorado and El Dorado Town) is a census-designated place (CDP) in Calaveras County, California, United States. The population was 1,628 at the 2010 census, up from 1,557 at the 2000 census. The town is registered as California Historical Landmark #282. The town center is quite small with fewer than 50 people living in it. The 5 mile square area surrounding the town accounts for the balance of the population.

Calaveras County ( ), officially the County of Calaveras, is a county in both the Gold Country and High Sierra regions of the U.S. state of California. As of the 2020 census, the population was 45,292. The county seat is San Andreas. Angels Camp is the county's only incorporated city. Calaveras is Spanish for "skulls"; the county was reportedly named for the remains of Native Americans discovered by the Spanish explorer Captain Gabriel Moraga. Calaveras Big Trees State Park, a preserve of giant sequoia trees, is in the county several miles east of the town of Arnold on State Highway 4. Credit for the discovery of giant sequoias there is given to Augustus T. Dowd, a trapper who made the discovery in 1852 while tracking a bear. When the bark from the "Discovery Tree" was removed and taken on tour around the world, the trees became a worldwide sensation and one of the county's first tourist attractions. The uncommon gold telluride mineral calaverite was discovered in the county in 1861 and is named for it. Mark Twain set his story "The Celebrated Jumping Frog of Calaveras County" in the county. The county hosts an annual fair and Jumping Frog Jubilee, featuring a frog-jumping contest, to celebrate the association with Twain's story. Each year's winner is commemorated with a brass plaque mounted in the sidewalk of downtown Historic Angels Camp and this feature is known as the Frog Hop of Fame. In 2015, Calaveras County had the highest rate of suicide deaths in the United States, with 49.1 per 100,000 people.

California Cavern is a Limestone cave in the Sierra Nevada foothills, in Cave City, Calaveras County, California. The series of interconnected caverns are one of the earliest officially recorded caves in the Mother Lode region of California. Although one of numerous caves in the Mother Lode region, California Caverns claims the distinction of having the most extensive system of caverns and passageways.

Cave City is an unincorporated community in Calaveras County, California. It lies at an elevation of 1,617 feet (493 m) and is located at 38°12′09″N 120°30′31″W. The community is in ZIP code 95222 and area code 209. Like most communities in Calaveras County, Cave City began as a mining town. It was an important placer gold mining site in the 1850s, and at its peak had hundreds of residents, a hotel, a store, and one of the few schools in Calaveras County. The population quickly declined, and by the 1950s no structures remained. Today it is the location of the California Caverns, the most extensive system of caverns and passageways in the area.