Redstone, Colorado

Redstone is an unincorporated town and a census-designated place (CDP) located in and governed by Pitkin County, Colorado, United States. The CDP is a part of the Glenwood Springs, CO Micropolitan Statistical Area. The population of the Redstone CDP was 127 at the 2020 United States census. The Carbondale post office (Zip Code 81623) serves Redstone postal addresses.

The village is listed on the National Register of Historic Places as a historic district and includes several properties that are also separately listed on the National Register.

History
Redstone was established in the late 19th century by industrialist John Cleveland Osgood as part of a coal mining enterprise. Osgood's coal empire also spurred construction of the Crystal River Railroad and Redstone's historic dwellings. 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. Most of these Craftsman-era Swiss-style cottages are still used as homes.

Cleveholm
A dominant feature of Redstone is Cleveholm Manor, commonly called "Redstone Castle," an opulent 42-room Tudor-style mansion that Osgood built for his second wife, Swedish Countess Alma Regina Shelgrem. Construction of Cleveholm Manor, which was designed by New York architects Boal and Harnois, began in 1897 and was completed in 1901. The Castle was part of a 72 acre estate that also included servants' quarters, a gamekeeper's lodge, a carriage house, and a greenhouse. Cleveholm Manor and the gamekeeper's cottage are both independently listed on the National Register as Osgood Castle and Osgood Gamekeeper's Lodge, respectively. As of 2004, the Castle still contained 75 percent of its original furnishings.

The historic inn in Redstone, which is independently listed on the National Register as Redstone Inn, is now operated as a resort inn, offering year-round accommodations.

Geography
The Redstone CDP has an area of 1.134 km2, all land.

Climate
Redstone has a humid continental climate (Koppen: Dfb). Summers are warm with cool nights and winters are cold with extremely heavy snowfall averaging 170 in annually.

Demographics
The United States Census Bureau initially defined the Redstone CDP for the 2010 United States census.