Custer is located at (). According to the United States Census Bureau, the city has a total area of 4.7 km sq (1.8 square miles), all land. Custer has been assigned the ZIP code 57730 and the FIPS place code 15140. Its primary telephone prefix is 673 in Area Code 605. Custer is generally considered to be the oldest established town and the "mother city" of the Black Hills of South Dakota and Wyoming. The site of one of the major encampments of the Black Hills Expedition of Brevet Major General (a largely ceremonial title, his official rank was Lt. Colonel) George Armstrong Custer's 7th Cavalry in 1874 and the location of the first public discovery of gold in the Black Hills, it was first established as the town of Stonewall (after Stonewall Jackson) by illegally trespassing gold-boomers in 1875, but the town was renamed quickly. Almost abandoned in 1876 when word of the much larger gold strikes in Deadwood Gulch spread, Custer City later became an established city, if smaller and less wealthy than the Northern Hills cities of Deadwood, South DakotaDeadwood and Lead, South DakotaLead. In addition to continued mining of precious metals, other industrial minerals today form the mainstay of the local mining industry, while timber production, tourism, and government services form the basis for the economy. Custer is the headquarters for the Supervisor of the Black Hills National Forest of South Dakota and Wyoming, is convenient to major tourist attractions like Jewel Cave National Monument, Wind Cave National Park, Custer State Park, Mount Rushmore National Memorial, and its own Crazy Horse Memorial. Custer claims to have the widest Main Street in the United States. Townspeople claim the street was made wide enough for a team of oxen pulling a wagon to turn completely around, although this is an unverified (and, perhaps, unverifiable) claim to fame. The Custer school colors are purple and gold and the mascot is the Wildcat. Custer observes a "Gold Discovery Days" celebration and festivities annually in late July to celebrate the discovery of gold by the Custer expedition in nearby French Creek. Source: http://en.wikipedia.org/wiki/Custer%2C_South_Dakota