Redstone Castle

Year Listed: 2004
County: Pitkin County
Construction Date: 1903
Threat When Listed: Demolition
Status: SAVE-2006

When empires were built in a nationwide drive toward industrialism, John Cleveland Osgood constructed a forty-two-room castle which he christened Cleveholm Manor as a testament to his achievements. Osgood formed the Colorado Fuel & Iron Company (CF&I), which become the sole coal supplier to regional railroads across the Rockies, making Osgood one of the wealthiest men in the county. Osgood spared no expense in constructing his home and hired prominent Denver architets, Austriane stonemasons, and Italian craftsmen.  Construction of the casetle begain in 1899 and was completed in 1902 at an estimate of $2.5 million.  At the turn of the century, guests traveled by steamship and rail to Redstone.  His eestate encompased 550 acres fenced in wroguth iron, guarded by two distinctive gatehouses, and included stables, a carriage house, greenhouse, gamekeeper’s cottage, hydroelectric power plant, and a large working farm.   The property, originally known as Cleveholm Manor, is listed on the National Register of Historic Places.

At the time Redstone Castle was listed on the Endangered Places Program, the Internal Revenue Service (IRS) had seized the castle and related properties in connection with a federal wire and securities fraud investigation.   Transfer of the building out of federal ownership required the IRS to comply with Section 106 of the National Historic Preservation Act.  This mechanism proved to be the path to a long-term preservation solution for the castle.  Many groups became consulting parties for the project to include: Colorado Preservation, Inc., the National Trust for Historic Preservation, the Redstone Historical Society, Pitkin County, the Redstone Community Association, the National Park Service, the West Elk Loop Scenic & Historic Byway, Crystal Valley Environmental Protection Agency, Crystal River Caucus, and the Colorado Historical Society.  

The result of these meetings lead to an acquisition agreement that would protect the castle from demolition and prevent the removal or change of its fixed interior contents. When the IRS auctioned the castle in the spring of 2005, a preservation easement protected the exterior of the main buildings, the interior of the major rooms, and twenty-two acres surrounding Redstone Castle. In addition, the 138 acres adjoining Redstone Castle was designated a Historic District by the county and is subject to review by the Redstone Historic Preservation Commission.

In 2006,the IRS and partners including Colorado Preservation, Inc., the Redstone Historical Society, the National Trust for Historic Preservation and the Colorado Historical Society received an award from the Advisory Council on Historic Preservation for the easement on the Castle. New preservation minded owners acquired the castle in 2016, completed a historic structure assessment, created a site master plan, and a State Historical Fund grant has been completed for extensive masonry repairs.

Additional Links:
The Historic Redstone Castle

Donate to CPI

We hope you will extend your appreciation for Colorado's heritage by helping us take advantage of this $1 to $1 matching campaign. Learn more about our matching campaign and make your tax-deductible donation today!

Matching Campaign

Thank you to our donors for this matching campaign!


Hannah Braun

Laurel Campbell

Nore Winter

Peter Grosshuesch

Matt Goebel

Andy Duckett-Emke

Kelly and Peter Merrion

Blair and Chris Miller

Keith and Carmen Willy

Mike and Anne Coughlin

Steven Turner and  Steven Kick

T. Drew Notestine


Elaine Freed

Megan Concannon

Nicole Hernandez

Ron and Linde Thompson

Dan Corson

Lucas Schneider

Jon Nathan Schler

Jane and Phil Watkins

Ariel Steele 

Kimberly Kintz

Lisa A. Stegman

Graham Johnson

James and Joan Kroll

James Hewat

JoVonne P. Fitzgerald

Jennifer Wahlers

Stephen Blitz

Arianthé Stettner

Ann Mullins

R. Michael Bell

Nan and Dave Anderson

Patrick Eidman

Beverly Rich

Jane Daniels

Kaaren Hardy

Cynthia Pond

Rheba Massey

Katherine Woods and Christopher Koziol

Dave Lively

Paul O’Rourke

Lisa May

Sally Hopper

Ann Alexander Walker

Julie Johnson


Judith W. Amico

Featured Project

Preservation for a Changing Colorado

The 2017 update, Preservation for a Changing Colorado, resulted from a partnership between Colorado Preservation and History Colorado and Colorado Preservation, Inc. Prepared by Clarion Associates, the new report and accompanying website document the economic benefits of rehabilitation projects, analyzes property values and neighborhood stability in local historic districts, and summarizes the increasing impact of heritage tourism, private preservation development and the success of Colorado’s Main Street program. In a key finding, researchers found that for every $1 million spent on historic preservation in Colorado leads to $1.03 million in additional spending, 14 new jobs, and $636,700 in increased household incomes across the state! The 2017 report also considers the important role preservation plays in helping Coloradans provide new spaces for creative communities and co-working, create and sustain meaningful places, respond to the state’s changing demographics, and address climate concerns. Click Here to see the full report, "Preservation for a Changing Colorado".