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Connecticut’s 16-acre granite fort has watched this harbor for 200 years: What we know so far

By [email protected] · October 16, 2026 · 6 min read
Connecticut’s 16-acre granite fort has watched this harbor for 200 years: What we know so far

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Fort Trumbull’s long watch over New London Harbor

New London sits where the Thames River spills into Long Island Sound, and right at that junction stands a fort that has watched over the water since before the United States existed. Fort Trumbull covers 16 acres on a rocky point, and the grounds are free to walk any day of the week from 8 a.m. to sunset. What you find inside that perimeter goes well beyond a pile of old stones. Wikimedia Commons/Giorgio Galeotti

Benedict Arnold burned this place to the ground

The first fort here went up in 1777 to guard New London Harbor. Four years later, on Sept. 6, 1781, British forces led by Benedict Arnold, a Connecticut native who had defected to the British side, came in and burned the area. The fort you walk through today rose from that history, built between 1839 and 1852 from granite cut to last. Two centuries of coastal watching are baked into every wall. Wikimedia Commons/Flintlock1204

The Egyptian stonework that no other fort has

Out of 42 forts built under the country’s Third System of coastal defense, Fort Trumbull is the one that went its own way on design. The builders used Egyptian Revival details, a style you won’t find on any other fort in the system. The stonework and masonry were considered the finest work of their era. Five sides, sloping walls, and granite laid so tight it still reads as a single solid mass from across the river. Shutterstock

Climb the ramparts for a view that stops you cold

Get yourself up to the top of the ramparts and the whole harbor opens up. The Thames runs below, boats move in and out, and downtown New London sits across the water to your left. Look across to Groton and you can pick out Fort Griswold on the far bank. The two forts face each other across the river the way they have for most of American history. Most people who make that climb say it’s the best waterfront view in the area. Wikimedia Commons/Flintlock1204

Walk through rooms that soldiers actually lived in

The fort interior pulls you through time in a way that wall panels alone can’t. Living quarters are restored to the late 1800s, close enough to the original that you can picture the daily grind of garrison life.

Then the tone shifts. A 1950s-era office sits furnished like a Cold War research lab, which is exactly what this place became. Informative markers line the rooms, and an elevator gets you up to the higher portions if the stairs aren’t your thing. Wikimedia Commons/Roddy Pfeiffer

Touch a real cannon and see guns still pointed at the harbor

The fort kept its teeth. Original gun emplacements are still set into the walls, and two restored 8-inch guns sit locked in their firing position, aimed out at the water the way they were meant to be. On the grounds, there’s a touchable cannon surrounded by an artillery crew display that shows how the harbor defense actually worked. Kids tend to head straight for the cannons. The adults usually follow. Wikimedia Commons/Flintlock1204

A museum that covers 225 years of American military history

The visitor center museum packs in more than two centuries of history from the Revolutionary War straight through to the Cold War. Multimedia theaters, touch-screen displays and 3-D models lay out the two biggest stories of this place: the British attack of 1781 and the World War II submarine defense operations run from this stretch of the Thames. The center runs Wednesday through Sunday during the warmer season. Give it an hour and it earns every minute. Shutterstock

A 1.3-mile waterfront loop worth every step

The paved loop and boardwalk runs about 1.3 miles along the shoreline, rated easy and mostly flat the whole way. The path swings past a string of water views, with the fort filling the frame from different angles as you move around it. Benches sit at the open stretches where the river widens. You can walk the whole thing in 30 minutes or stretch it to an hour if you stop where the view asks you to stop. Wikimedia Commons/Roddy Pfeiffer

Cast a line from a pier that runs 500 feet into the river

The fishing pier here is unlike anything else on this stretch of coast. It runs more than 500 feet out into the Thames, with lighting for night fishing, individual pole holders built into the railing, and year-round restrooms nearby. The pier sits right at the mouth of the river where it meets the Sound, which puts you over striped bass, bluefish, tautog and flounder. The pier is open 24 hours, which means you can be out there before sunrise if that’s your approach.

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The post Connecticut’s 16-acre granite fort has watched this harbor for 200 years appeared first on When In Your State.

Wikimedia Commons/Roddy Pfeiffer

Spread out on the grass with boats drifting past

The grounds give you room to breathe. Picnic tables sit on wide lawns with the water in plain view, and the open space works for kite flying, a slow afternoon, or just watching the harbor traffic drift by. Leashed dogs are welcome on the park grounds. There’s nothing complicated about it: you show up, you find a spot on the grass, and the river does the rest. It’s a low-key outing that costs nothing to walk into. Shutterstock

Live music and reenactors bring the fort back to life

In the warmer months the grounds turn into a gathering place. Concerts go up on the lawn, historical reenactors work through scenes from the fort’s past, and the park has even hosted vintage baseball games on the open grass. The events draw both New London locals and people coming in from outside the area. The waterfront setting, open sky and river breeze make it a natural place for a crowd. Shutterstock

Visit Fort Trumbull State Park in New London

Fort Trumbull State Park sits at 90 Walbach St. in New London, Connecticut. The grounds are free and open daily from 8 a.m. to sunset. The visitor center and fort tours run Wednesday through Sunday from Memorial Day to Labor Day, with weekend-only access for part of the shoulder season. Admission to the visitor center and fort is $6 for anyone 13 and up, $2 for ages six through 12, and free for children under five. The site does not accept credit cards, so bring cash. This article was created with AI assistance and human editing. Read more from this brand:

You can sit inside America’s first submarine at this Connecticut museum

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The post Connecticut’s 16-acre granite fort has watched this harbor for 200 years appeared first on When In Your State.

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