Theodore Roosevelt Island
An 88.5-acre island and national memorial in the Potomac River honoring U.S. President Theodore Roosevelt.
Last updated August 24, 2026
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Overview
Theodore Roosevelt Island is an 88.5-acre island and national memorial in the Potomac River within the District of Columbia. Although its primary pedestrian access is from Arlington, Virginia, the island itself lies entirely within Washington, D.C. and is managed by the National Park Service as part of the George Washington Memorial Parkway. It is both a commemorative landscape dedicated to Theodore Roosevelt and a natural urban park containing forests, wetlands, tidal shoreline, marshes, trails, and a footbridge connection to the Virginia bank. The island has carried several names over the centuries, including My Lord's Island, Barbadoes Island, Mason's Island, Analostan Island, and Anacostine Island. Indigenous communities associated with the Nacotchtank are recorded as having used the island in the seventeenth and early eighteenth centuries. In the eighteenth century it became associated with the Mason family. John Mason developed an estate there in the 1790s, including a residence, gardens, agricultural activities, and a ferry operation serving the Potomac crossings between Virginia and Georgetown. The island's position in the river also made it relevant to transportation, navigation, and disputes surrounding the retrocession of Alexandria County from the District of Columbia to Virginia. During the Civil War, federal forces occupied the island and established Camp Greene. After African Americans were permitted to enlist in the Union Army, the island was used to train United States Colored Troops. From 1864 into 1865, it also housed as many as approximately 1,200 formerly enslaved people under military and later Freedmen's Bureau administration. This history is an important part of the site's interpretation, alongside its associations with the Mason family and the Roosevelt memorial. The island later served as a secluded location for experiments involving electrical ignition of explosives during the Spanish-American War period. Washington Gas Light Company owned the property from 1913 to 1931, during which time its vegetation became substantially overgrown. In 1931, the Theodore Roosevelt Memorial Association acquired the island to establish a memorial. President Herbert Hoover formally accepted it for the federal government in 1932, and it was given the name Theodore Roosevelt Island. Landscape architect Frederick Law Olmsted Jr. developed the central planning concept. Rather than creating a conventional urban monument, designers sought to restore or simulate a natural forest, allowing the memorial to express Roosevelt's interests in conservation, outdoor life, and public service. The Civilian Conservation Corps cleared much of the overgrown property in the 1930s, while the remains of the Mason residence were largely removed; part of the foundation survives. Congress provided funding for the memorial in 1960. The completed memorial, designed by Eric Gugler, was dedicated on October 27, 1967. Its principal elements are a 17-foot bronze statue of Roosevelt by Paul Manship, four large stone tablets bearing quotations associated with Roosevelt, and fountains arranged within a formal plaza. The memorial is listed on the National Register of Historic Places as part of the federally administered historic park system. Today, the island is primarily a pedestrian and nature destination. Visitors reach it via a footbridge from a parking area along the Virginia shore, with additional approach options from the Mount Vernon Trail and Rosslyn. Cars and bicycles are not permitted on the island. Its trails pass through upland forest, swamp, marsh, and riverside habitats, making it notable for birdlife, spring wildflowers, and freshwater tidal ecology. Seasonal floods and invasive plant species remain continuing management considerations. The site also appears, in fictionalized form, in films and video games, including Captain America: The Winter Soldier and Tom Clancy's The Division 2.
History
Theodore Roosevelt Island occupies a strategically situated section of the Potomac River between Georgetown and the Virginia shore. Its earliest recorded names reflect Indigenous and colonial history. Nacotchtank people are documented as having moved to the island in the late seventeenth century, and the island was later patented under names including Analostan and Barbadoes. The property came into the Mason family in the eighteenth century and was inherited by George Mason IV before passing through the family to John Mason. John Mason established a substantial estate on the island around the end of the eighteenth century. He built a mansion, cultivated crops and gardens, and used enslaved and free Black labor in maintaining the property. The island was also a social and commercial center: Mason hosted prominent gatherings, operated ferry services, and participated in efforts to improve Potomac navigation. A causeway built after an eighteenth-century flood altered the river's channel and affected Georgetown's port interests. The island's location became entangled with political arguments over the retrocession of territory from the District of Columbia to Virginia. Changing river conditions, including water stagnation, contributed to the Mason family's departure in the 1830s. John Mason sold the property to John Carter in 1842, and it subsequently passed to William A. Bradley. The island remained associated with regional social life during this period, including a mid-nineteenth-century celebration connected with the opening of Japan to foreign trade. Federal forces occupied the island during the opening of the Civil War after Virginia ratified secession. The former Mason property became Camp Greene, a Union military training site. It was particularly significant as a training location for Black Union soldiers, including the 1st United States Colored Infantry. Between 1864 and 1865, the island also housed a large population of formerly enslaved people, first under military authority and later under the Freedmen's Bureau. In 1898, the island was used for secretive experiments involving electrical ignition of explosives conducted by chemist Charles Edward Munroe. Reports from residents led police to investigate suspected Spanish espionage, but the activity was connected to private testing rather than foreign agents. Washington Gas Light Company owned the island from 1913 until 1931, when the site had become heavily overgrown. The Theodore Roosevelt Memorial Association purchased the property in 1931 with the aim of creating a memorial to the former president. Congress authorized the memorial in 1932, and President Herbert Hoover accepted the island for the federal government in a White House ceremony later that year. Frederick Law Olmsted Jr. prepared a landscape plan that emphasized a designed approximation of a natural forest rather than a heavily urbanized monument. Civilian Conservation Corps workers cleared vegetation and removed most of the remaining Mason house structure during the 1930s, leaving portions of the foundation. Congress appropriated funds for construction in 1960. Eric Gugler designed the memorial plaza, while Paul Manship created its monumental Roosevelt statue. The memorial was dedicated on October 27, 1967, and includes the statue, quotation monoliths, and fountains. The National Park Service administers the site through the George Washington Memorial Parkway. The island's current character reflects both memorial planning and ecological management, with trails traversing deciduous uplands, freshwater tidal wetlands, marsh, and flood-prone lowlands. It remains a car-free public landscape devoted to historical interpretation, conservation, and walking access in the national capital region.
- 1967
Memorial dedicated
[1]The Theodore Roosevelt Memorial was dedicated on October 27, featuring a statue, quotation tablets, fountains, and a formal plaza.
- 1960
Congress provides memorial funding
[1]Federal funding was designated for construction of the Roosevelt memorial after decades of planning.
- 1935
Naturalistic landscape work begins
[1]Civilian Conservation Corps crews cleared the overgrown landscape and removed most of the remaining Mason mansion structure.
- 1932
Federal memorial designation
[1]Congress authorized the memorial, and President Herbert Hoover accepted the island for federal memorial purposes.
- 1931
Memorial association acquires the island
[1]The Theodore Roosevelt Memorial Association purchased the property from Washington Gas Light Company to create a Roosevelt memorial.
- 1864
Training site for United States Colored Troops
[1]The island served as a training location for Black Union soldiers and housed formerly enslaved people.
- 1861
Union occupation and Camp Greene
[1]Federal forces occupied the island during the Civil War and established a military camp there.
- 1796
John Mason estate established
[1]John Mason built a mansion and developed agricultural and garden operations on the island.
- 1724
Mason family acquisition
[1]George Mason III acquired the island, beginning its long association with the Mason family.
- 1682
Colonial-era patent recorded
[1]The island was patented under names including Analostan and Barbadoes Island, following earlier Indigenous use and settlement.
Products and positioning
A national memorial presented through a naturalistic landscape, combining presidential commemoration, conservation themes, Civil War history, and urban outdoor recreation.
National memorial · 1967
Theodore Roosevelt Memorial
The central commemorative installation consists of a 17-foot statue of Theodore Roosevelt by Paul Manship, four large stone monoliths carrying quotations associated with Roosevelt, and fountains set within a plaza designed by Eric Gugler. The memorial presents Roosevelt through themes of public service, conservation, strenuous outdoor life, and civic responsibility.
Outdoor recreation
Island trails and boardwalk
A network of pedestrian trails crosses the island's wooded uplands, swampy bottomlands, marsh edges, and river shoreline. A boardwalk provides access through wetter habitat. The trails support walking, nature observation, and interpretation of the island's ecological and historical resources; bicycles and motor vehicles are not permitted on the island.
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