Redstone is an unincorporated town and a census-designated place (CDP) located in and governed by Pitkin County, Colorado, United States.

[5][6][7] Redstone was established in the late 19th century by industrialist John Cleveland Osgood as part of a coal mining enterprise.

As an experiment in "enlightened industrial paternalism," Osgood constructed 84 cottages and a 40-room inn, all with indoor plumbing and electricity, for his coal miners and cokers, as well as modern bathhouse facilities, a club house with a library and a theatre, and a school.

The Castle was part of a 72-acre (29 ha) estate that also included servants' quarters, a gamekeeper's lodge, a carriage house, and a greenhouse.

Summers are warm with cool nights and winters are cold with extremely heavy snowfall averaging 170 inches (430 cm) annually.