National Register of Historic Places

Castle Rock

Garrison, Putnam County, New York
Listed
December 12, 1977
Type
District
Period
Listed
Ref No.
77000972

About this property

Castle Rock, also called the Osborn Castle, is the estate of former Illinois Central Railroad president William H. Osborn in Garrison, New York, United States. It sits on the hill of the same name, looking down on the Hudson River 620 feet (190 m) below. Visible from West Point across the river and traffic on NY 9D passing through Garrison, it has become one of the most recognizable man-made landmarks of the Hudson Highlands. The Osborn family, including paleontologist Henry Fairfield Osborn and his son, conservationist Henry Fairfield Osborn, Jr, owned and lived in it since it was built by J. Morgan Slade in 1881 as a summer residence, although the original acreage has been subdivided considerably since then. In 1977 it was listed on the National Register of Historic Places. Castle Rock was bought in 2021 by George Carroll Whipple III, a third generation Putnam county resident and philanthropist.

Location

Garrison, Putnam County, New York
41.37001, -73.94032

Categories

ARCHITECTURE
National Register nomination ›
Sources

Property data from the National Register of Historic Places, National Park Service (public domain).

Description adapted from Wikipedia under the Creative Commons Attribution-ShareAlike 4.0 International License.

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Everything a full report reveals about Castle Rock

This page lists Castle Rock. A full Aubrey report for an address near it pulls together this listing alongside battlefield records, land patents, and every other historical record within a chosen radius:

Overview
An interactive map of the location with historic sites, battles and Native heritage plotted, and its full story era by era.
The Land
The historic sites and place names around the location, and how this land was settled and used.
Geology
The bedrock beneath the site, its age and rock type, reaching back millions of years.
LiDAR Terrain
Laser-scanned terrain that reveals earthworks and old features hidden in the landscape.
Conflict & War
The battles, raids and skirmishes fought near here, across every era of American conflict.
The Civil War
The Civil War on this ground, 1861 to 1865: who held it, and the battles, camps and regiments nearby.
The Soldiers
The men who marched from here in the Civil War, named and traced where the record allows.
Native Heritage
The Native nations who held this land, mapped across time from before European contact to today.
Settlement
Who claimed and held this ground, from Indigenous homelands through the colonial powers to the United States.
The Community
How the town grew, who came, and what kind of place it became, traced through the census record.
Rivers & Rail
The rivers, canals and railroads that connected this place between 1830 and 1911.
Notable People
The people born, buried or genuinely tied to this exact place, with their stories.
Historical Maps
Historic maps of the location layered over how it looks today.
Finds & Access
Museum objects tied to the area, and the laws on searching, collecting and access here.
Literature
The old books, county histories and archives that mention this place, quoted with their sources.
Spotlight
A deep dive into the most remarkable, lesser-known history of the place, traced back to the record.
Points of Interest
The most significant historic sites and landmarks near the location, and why they matter.
Timeline
The whole story of the location told era by era, from first peoples to the present day.
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Nearby Historic Sites

Birches, The
Industrial
0.4 mi
Walker House
Industrial
0.4 mi
Garrison Grist Mill Historic District
Industrial
0.5 mi
Mandeville House
Industrial
0.5 mi
Oulagisket
Industrial
0.5 mi

Nearby Battles

Battle of Fort Montgomery and Fort Clinton
1777Revolutionary War
4.3 mi
Battle of Fort Montgomery
1777Revolutionary War
4.4 mi
Battle of Fort Clinton
1777Revolutionary War
4.4 mi
Battle of Fort Clinton and Fort Montgomery
1777Revolutionary War
4.6 mi

Questions about this property

When was Castle Rock listed on the National Register?

Castle Rock was listed on the National Register of Historic Places on December 12, 1977.

What type of historic resource is Castle Rock?

Castle Rock is classified as a district in the National Register of Historic Places.

What is the period of significance for Castle Rock?

The period of significance for Castle Rock is recorded as the listed era.

Can I research the history near Castle Rock?

Yes. Aubrey Research reports search National Register listings, battlefield records, land patents, and other primary historical sources within any radius of a US address. A report for an address near Castle Rock will include this listing and all other historical records in the area.

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