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Tregaron Conservancy

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Dog friendly

outdoors

Address: 3100 Macomb St NW
Hours: sunrise-sunset
Phone: +12028105009
Website: tregaron.org (opens in a new tab)

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Place data from OpenStreetMap, © OpenStreetMap contributors, ODbL.

Also listed in Overture Maps open data.

Updated 28 Sept 2026. Something wrong? Tell us.

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SeeHistoric site
Tregaron Estate
"Tregaron Estate," formerly known as "The Causeway," is a country house and estate located in the Cleveland Park neighborhood of Northwest, Washington, D.C. The estate, built in 1912, was designed by architect Charles Adams Platt and landscape architect Ellen Biddle Shipman. The original owners, Alice and James Parmelee, lived at the estate from the time of its construction until 1940. From 1942 to 1958, it was occupied by Joseph E. Davies, who had served as United States ambassador to several countries, and his second wife, Post Cereal Company heiress Marjorie Merriweather Post.
Heritage listed
DoPark
Klingle Valley Park
SeeAttraction
Twin Oaks
Twin Oaks (Chinese: 雙橡園; pinyin: Shuāng Xiàng Yuán) is a 17-acre estate located in the Cleveland Park neighborhood in Washington, D.C., United States. It was the residence of nine Republic of China ambassadors to the United States before the United States broke off diplomatic ties with the Republic of China on Taiwan in 1979. The estate is bounded by Macomb street in the north, 33rd Place NW and residences in the west, Woodley and Klingle roads in the south, and in the east by former Tregaron Estate.
Open now · closes 5 pm
SeeLibrary
Cleveland Park Library
The Cleveland Park Neighborhood Library is a branch of the District of Columbia Public Library in the Cleveland Park neighborhood of Washington, D.C. It is located at 3310 Connecticut Avenue NW. A library building opened on the site in 1953 and was replaced in 2018 by a larger facility that was built at a cost of $19.7 million. The new library's design garnered praise and plaudits; DCist described it as "strikingly stylish" and it won the 2019 Urban Catalyst award from the local chapter of the American Institute of Architects.
Open now · closes 8 pmWheelchair accessible