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Castleton was a bustling mining supply center located not far from the present day town of Castle Valley. It was reportedly first settled by Doby Brown, a prospector, in the early 1880s. A post office was established in Castleton in 1882, and numerous other buildings soon followed. Castleton not only boomed along with Miner’s Basin, it also died along with it when the mines closed in 1907. Today, the remains of Castleton can be seen some 10 miles southeast of the Castle Valley turnoff of state highway 128.(*)

At its peak in 1895, the population exceeded that of Moab. In fact, when Grand County was organized in 1890, Castleton vied with Moab for the chance to be county seat.