Castleton is a ghost town located on the La Sal Mountain Loop Road about 18 miles northeast of Moab in Grand County, Utah. The nearest inhabited town is Castle Valley.

Castleton was a short-lived gold placer mining camp that existed here in the 1860s, but the area was first settled by a prospector named Doby Brown in the late 1870s or early 1880s. By 1882 enough settlers had gathered to establish a post office. In 1888 when a local gold rush began at nearby Miners Basin, Castleton became important as a supply town. It had some buildings such as a general store, hotel, two saloons, and several other businesses. The town reached its peak in 1895, when the population exceeded that of Moab. In fact, when Grand County was organized in 1890, Castleton rivaled with Moab for the chance to be county seat.

The Panic of 1907 closed down Castleton's mines, and soon ranchers were the only residents. By 1910 the businesses were gone, leaving only the post office, and the population had dropped to a few dozen. By 1930 there were only a few residents. A few people stayed in the dead town for decades, but in 1967 the county commission officially vacated Castleton as an occupied town.

Grand County is located in eastern Utah and is surrounded by six other counties, including three counties from Colorado.

According to the 2000 Census, Grand County has a population of just over 8,000 people. The county has a total area of 3,694 square miles with 13 square miles of water. Grand County has a total of nine communities, some of which are currently ghost towns. Most of the population of the county is concentrated in Moab, the largest city and county seat that hosts most of the tourists of Grand County.

The majority of Grand County consists of extraordinary landscapes of desert, cliffs, mountains, canyons, rivers and creeks. The county is home to parts of three national protected areas, which attract a large number of visitors for its scenic and unique features and variety of outdoor activities.

The Arches National Park has a total of 119 square miles and is home to several unique figures and shapes of rock and stone. The most notable landmark in the park is the world famous Delicate Arch, which stands 52 feet tall and has become a symbol of Utah.

The Canyonlands National Park covers an area of over 500 square miles and has a stunning landscape of canyons with the Green River and Colorado River flowing through.

The Manti-La Sal National Forest covers more than 1.4 million acres and is home to many mountain peaks reaching altitudes over 12,000 feet, mostly located in the La Sal Range of Grand County.