Fort De Soto, Florida — History & Visitor Guide

Fort De Soto (Pinellas County, Florida)

Pinellas County · Florida · Spanish-American War

Quick BriefFort De Soto was a coastal defense post on Mullet Key in Tampa Bay, Florida, built during the Spanish-American War. Construction began in November 1898, and in April 1900, the post was renamed Fort De Soto after the Spanish explorer Hernando De Soto. The fort became inactive in 1909 with only a caretaker remaining, and was abandoned in 1923. Fort De Soto Park was officially dedicated on May 11, 1963.

Endicott SystemCoastal defenseOpen to visitors

History & Significance

U.S. Army Engineers first surveyed the area in 1849 for possible use as a coastal defense area and recommended both Egmont and Mullet Keys for military use. In 1898, when the United States became involved in a conflict in Cuba that led to the Spanish-American War, citizens of Tampa demanded military defenses for Tampa Bay.

Construction began in November 1898, and within the first six months a 275-foot wharf, mess hall, office, stable, and workers' quarters were built. Between 1900 and 1906, additional structures were constructed, and when complete, the fort included 29 buildings—all of wood construction with slate roofs.

The first mortar battery was completed in May 1900. At its peak, the fort was garrisoned by 125 troops.

In 1909, troops were transferred to Fort Morgan, Alabama. On May 25, 1923, Fort De Soto and Fort Dade were abandoned, leaving one caretaker at each post.

In August 1948, after the end of World War II, Mullet Key was sold back to Pinellas County. Battery Laidley houses the last four surviving carriage-mounted 12-inch seacoast mortars in the continental United States.

Fort De Soto and Fort Dade on nearby Egmont Key never saw combat. Today the fort is listed on the National Register of Historic Places and operates as a public park with a reconstructed quartermaster museum.

Key Facts

StateFlorida

LocationPinellas County

Established1898

Decommissioned1910

War / eraSpanish-American War

Current statusMuseum / Historic Site

Coordinates27.615499, -82.735902

NRHP reference77000407

Map

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🧳 Visiting

What you’ll see when you visit:

Spanish-American War-era brick and masonry fortification on Mullet Key
Artillery batteries and coastal defense mortars from 1898–1910
Historic ruins and museum exhibits documenting fort's military and WWII bombing range history
Sandy beaches and surrounding coastal landscape
Public park with recreational facilities

Best time to visitOctober through April offer pleasant temperatures; May through September brings heat and afternoon thunderstorms typical of Florida's Gulf Coast.

Getting thereNearest airport is Sarasota-Bradenton International (SRQ), approximately 30 km away; the fort is located in Pinellas County near the Tampa Bay area.

From the nearest major airportTampa International Airport (TPA)🚗 34 mi by road⏱️ ≈ 54 min drive

Fort De Soto (Pinellas County, Florida)

History & Significance

Key Facts

Map

🧳 Visiting

Sources

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