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The Diamond A or Spring Ranch is historically significant for its association with pioneer ranching in Fremont County. It retains fourteen well-preserved and finely-crafted stone, log, and wood frame buildings, many of which were constructed by David Williamson, a stonemason known throughout the region who also constructed many stone buildings for Wyoming towns, Fort Washakie, and nearby ranches. The log homestead cabin dates possibly as early as 1891. The main ranch house was constructed in several separate building episodes, the earliest dating from 1903. The Diamond A Ranch has operated continuously as a cattle and/or horse ranch for over one hundred years.

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