Box Elder County administrative offices are located at 1 South Main Street, Brigham City, UT 84302; phone: 435-734-3393 (county clerk).
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Box Elder is the extreme northwest county of Utah, bordering Nevada, Iowa, Cache County, Utah and Utah's Great Salt Lake.
Promontory Summit, about 30 miles west of Brigham City, is the location of the Golden Spike National Historic Site, the spot where the Union Pacific and Central Pacific Railroads joined 1,776 miles of railroad in 1869.