# Sinclaire House

- URL: https://palmerdivideresearch.com/places/sinclaire-house/
- Also known as: the Ratcliff ranch
- Kind: Historic homes and cabins
- Status: Living today
- County: Douglas County, Colorado
- Point: 39.2781, -104.9413 (from a cited description (good to a few hundred feet))

- Updated: 2026-10-07

## What we know

George Ratcliff, from England in 1860, started the ranch. The Pueblo Revival house was built in 1931-32 for Reginald Sinclaire, who had served in the French Foreign Legion and the U.S. Navy; the ranch grew to 4,500 acres and bred the runner-up in the 1946 Kentucky Derby. Sold to Perry Park's developers in 1965; National Register, 1991 (county map, S-0123, citing the 1983 county master plan appendix and Appleby).

## Where it was

Pin on the Douglas County Historic Resource Map (DCHR-023; Douglas County and Douglas County Libraries, 2012, on the Larkspur Historical Society's Google map, S-0123). Where that map and ours place the same site, the pins mostly fall within about 300 feet. Good to a few hundred feet.

Placed from a written description, such as a land section, a distance from a landmark or an old survey note.

## Sources

- S-0045: https://palmerdivideresearch.com/sources/#s-0045
- S-0046: https://palmerdivideresearch.com/sources/#s-0046
- S-0123: https://palmerdivideresearch.com/sources/#s-0123

## Nearby

- [Fort Washington (1868)](https://palmerdivideresearch.com/places/fort-washington-1868/): 0.9 mi southwest
- [Kinner house](https://palmerdivideresearch.com/places/kinner-house/): 0.9 mi southwest
- [Quick stone house (1884)](https://palmerdivideresearch.com/places/quick-stone-house-1884/): 1.2 mi southwest
- [Glen Grove School](https://palmerdivideresearch.com/places/glen-grove-school/): 1.3 mi southwest
- [Glen Grove Cemetery](https://palmerdivideresearch.com/places/glen-grove-cemetery/): 1.3 mi southwest
- [Huntsville (1860 site)](https://palmerdivideresearch.com/places/huntsville-1860-site/): 1.5 mi south

Source numbers (S-0000) refer to https://palmerdivideresearch.com/sources/. Compiled by Michael Christensen for Palmer Divide Research; CC BY 4.0.