Fortín de San Gerónimo

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Fortín de San Gerónimo de Boquerón
San Jeronimo aerial.jpg
Fort San Gerónimo picture taken from Caribe Hilton Hotel
Locator map
Locator map
Location of Fortín de San Gerónimo in Puerto Rico
Location Puerta de Tierra, San Juan, Puerto Rico
Coordinates 18°27′46″N 66°05′03″W / 18.462841°N 66.084199°W / 18.462841; -66.084199Coordinates: 18°27′46″N 66°05′03″W / 18.462841°N 66.084199°W / 18.462841; -66.084199
Area 0.4 acres (0.16 ha)
Built 1791
Governing body Private
NRHP Reference # 83004199[1]
Added to NRHP October 11, 1983

Fortín de San Gerónimo del Boquerón is a small fort located in the mouth of the Condado Lagoon, across from the historic sector of Miramar in San Juan, Puerto Rico.

It was built during the 17th century to replace a smaller battery (called El Boquerón) that stood at the easternmost end of the San Juan islet. The original Boquerón battery was used by the Spanish to defend the city of San Juan from attacks by Sir Francis Drake in 1595 and George Clifford, the third Earl of Cumberland in 1598, who managed to destroy it during his attack. San Gerónimo became part of San Juan's first line of defense, along with the San Antonio Fort/Bridge and Escambrón Fort, being the fourth and last line of defense the formidable Castillo de San Cristóbal, which guarded the city entrance proper.


San Gerónimo

The San Gerónimo and San Antonio forts were pivotal in repelling the invasion by the forces of British Admiral Henry Harvey and Sir Ralph Abercromby in 1797. On April 17, 1797, their combined forces (64 to 68 ships and 7,000 to 13,000 men) landed in Cangrejos, approximately three miles west of San Juan. San Juan's military forces, which included, among others, the Regimiento Fijo de Puerto Rico (Resident Regiment of Puerto Rico) and the Milicias Disciplinadas (Trained Militias) were outnumbered by the invaders by a ratio of almost three to one. Admiral Harvey blockaded the San Juan Harbor while Abercromby established his operations headquarters in San Mateo parish overseeing all of San Juan and the Martín Peña Bridge. Abercromby's strategy was to take the Martín Peña bridge in order to block Spanish reinforcements from the south and bombard San Gerónimo and San Antonio from Miramar to gain access to and cross the San Antonio Bridge into the San Juan islet. British forces included the Royal Marines, made famous by their later defeat of Napoleon's troops in Egypt. Then Governor of Puerto Rico Field Marshal Don Ramón de Castro y Gutiérrez, a brilliant strategist, prevented the British from advancing and frustrated their conquest of San Juan.

The San Gerónimo and San Antonio, sustained heavy damage from the constant bombardment during the two-week siege on the city. Chronicles describe the defenders shooting their muskets and cannons from behind sandbags because of the devastation their forts sustained. Both San Gerónimo and San Antonio were eventually rebuilt and expanded.

Fort San Gerónimo with El Condado in the background.

San Gerónimo is located adjacent to the grounds of the Caribe Hilton Hotel. It was listed on the National Register of Historic Places on October 11, 1983. Unlike similar forts near Old San Juan, it is not part of San Juan National Historic Site. San Gerónimo is owned by the Institute of Puerto Rican Culture, but is managed by the Hilton.[citation needed] The hotel occasionally used it for private gatherings, but during recent times it has fallen into such disrepair that visitors are no longer allowed. The "Polvorín de San Gerónimo", or gunpowder house, that was built in 1769 and supplied the fort with gunpowder, is now part of the Luis Muñoz Rivera Park nearby.

As recent as the year 2006, attempts were being made by the Instituto de Cultura Puertorriqueña and the U.S. Army Corps of Engineers to build a breakwater to stop any further deterioration from irreparably damaging the centuries old fort. Senate Vice President Orlando Parga has led efforts to modify some of the construction projects that would encroach on the fort or would hamper the Corps of Engineers' preservation and reconstruction efforts.[citation needed]

In July 2007, the Fort was the scene of protests against the construction of a tourist project called Paseo Caribe that would block access to the fortification. Protesters argued that the public should have free access to it. The protest lasted about a week during which the protesters halted the construction projects by climbing onto the cranes.[citation needed]

The Omnibus Public Land Management Act of 2009 directed the U.S. Secretary of the Interior to conduct a study to determine the suitability of including San Gerónimo as part of San Juan National Historic Site.[2]


  1. ^ Staff (2010-07-09). "National Register Information System". National Register of Historic Places. National Park Service. 
  2. ^ Pub.L. 111–11 § 7212

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