Redstone Castle: A Tour of Colorado’s Architectural Jewel


Redstone Castle, a 24,000-square-foot mansion built in 1902, boasts an impressive 42 rooms and stands as a testament to Colorado’s rich history and architectural grandeur. This majestic structure, also known as Cleveholm Manor or Osgood Castle, has been a beacon of luxury and history for over a century. The mansion is located along the Crystal River in the Redstone Historic District of Pitkin County, Colorado.


  • Redstone Castle has historical significance as a representation of Colorado's industrial age and its role in the social elite of the early 20th century.
  • The castle's architecture showcases a blend of Tudor and Victorian styles, making it a unique landmark in Colorado.
  • The castle's transition through time, from a private residence to a public historical site, offers insights into its preservation and current status.

Historical Significance

John Osgood, owner of the Colorado Fuel and Iron Company, founded Redstone to support the coal production efforts in the surrounding Crystal River Valley. He spent more than $2 million to build the 42-room, Tudor-style manor on 150 acres as a winter retreat. Osgood regularly entertained famous guests, including Theodore Roosevelt and John D. Rockefeller.

The castle played a significant role in hosting influential figures of the time and impacted social dynamics. Efforts to preserve the historic Redstone Castle, including its listing on the National Register of Historic Places, highlight its significance to Colorado’s heritage.

Architectural Marvels

Redstone Castle’s architectural design showcases a simplified version of the Stick style, with Tudor and Victorian influences. The interior features elegant details, such as:

  • Silk wallpaper in the French-themed music room
  • Green-dyed Spanish leather on the walls of the library
  • Hand-carved woodwork and imported furnishings

The castle’s strategic Rocky Mountain location, landscaped gardens, and architectural harmony with its natural surroundings add to its allure.

Life at Redstone Castle

During its peak, the castle had a staff to maintain daily operations and cater to the lifestyle of its inhabitants. It hosted grand events, from lavish parties to charity benefits, which shaped its legacy.

Today, Redstone Castle offers tours, hosts special events, and plays a role in the community. Visitors can experience nine meticulously restored boutique suites where dignitaries once slept.

Learning and Legacy

Redstone Castle engages in educational programs, research, and partnerships to promote history and preservation. Ongoing conservation efforts and restoration projects aim to preserve the castle for future generations.

The castle contributes to local history, holds significance in United States history, and promotes historical awareness and tourism in Colorado.


What is the historical significance of Redstone Castle in Colorado?

Redstone Castle represents Colorado’s industrial age and played a role in the social elite of the early 20th century, hosting influential figures like Theodore Roosevelt, John D. Rockefeller, and JP Morgan.

Can you visit Redstone Castle, and what can you see during the tour?

Yes, Redstone Castle offers tours where visitors can experience nine meticulously restored boutique suites and learn about the castle’s history.

How has Redstone Castle been preserved and maintained over the years?

Efforts to preserve Redstone Castle include its listing on the National Register of Historic Places, ongoing conservation efforts, and restoration projects.

What architectural styles are evident in Redstone Castle’s design?

Redstone Castle showcases a blend of Tudor and Victorian styles, with elegant interior details like imported furnishings and wooden paneling designed by Gustav Stickley.

How does Redstone Castle contribute to Colorado’s tourism and education?

Redstone Castle promotes historical awareness and tourism in Colorado through tours, educational programs, research, and partnerships.


About the author

Ransom Patterson

My expertise in Colorado life extends beyond just residing here; it’s also about living actively within the community. I spend my time cycling through Denver’s trails, experimenting with local cuisines, and immersing myself in the local music scene. These activities give me a unique perspective on the cultural and outdoor offerings of Colorado. This hands-on approach allows me to provide insider tips and personal recommendations that resonate with both locals and visitors alike.