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is an unincorporated community in and the county seat of Eureka County, Nevada, United States. Eureka is by far the largest community in Eureka County. Attractions include the Eureka Opera House (built in 1880 and restored in 1993), Raine's Market and Wildlife Museum (built 1887), the Jackson House Hotel (built 1877), and the Eureka Sentinel Museum (housed in the 1879
Eureka is located at , in the southern part of Eureka County, at 6,481 feet (1,900 m) in the Diamond Mountain Range, in a draw on the southern end of Diamond Valley, between Antelope and Newark valleys. The total population of Eureka and the surrounding area
The town is located along U.S. Highway 50, nicknamed "The Loneliest Road in America": aptly named, as the nearest towns along the highway are Austin (71 miles (114 km) west) and Ely (77 miles east). The nearest town is Duckwater, Nevada, 59 miles (94 km) south.
The climate is typical of the Great Basin: hot and dry in the summer with occasional monsoonal thunderstorms from late July through August; cold and relatively dry. Snow accumulations vary from virtually none in mild winters to in excess of in more severe years. Temperatures routinely drop to or lower in the winter.