Qualla: Fort Montgomery (Lake Champlain)

Fort Montgomery (Lake Champlain): Introduction

Mon, 23 Feb 2026 00:00:00 GMT

Photo credit Mfwills, CC BY-SA 3.0. They built it in the wrong country. In 1816, the United States Army began constructing an octagonal fort at Rouses Point, New York, on the northernmost tip of Lake Champlain, designed to guard against another British invasion like the one that had produced the Battle of Plattsburgh just two years earlier. President James Monroe himself visited the rising fortification in July 1817. Then a new survey revealed an embarrassing truth: the 45th parallel -- the border with Canada -- actually lay some distance south of where the old markers indicated. The fort was in Canada. Construction halted, the site was abandoned, locals scavenged its stone for their own buildings, and the unfinished fortress earned a nickname that would stick for two centuries: Fort Blunder.

Image: Mfwills | CC BY-SA 3.0

Fort Montgomery (Lake Champlain): A Second Chance at the Border

Mon, 23 Feb 2026 00:00:00 GMT

Photo credit Mfwills, CC BY-SA 3.0. The story might have ended there, an amusing footnote in the annals of military surveying errors. But in 1842, the Webster-Ashburton Treaty redrew the boundary, and the disputed point at Rouses Point returned to American territory. Two years later, construction began on a second ...

Image: Mfwills | CC BY-SA 3.0

Fort Montgomery (Lake Champlain): Surrounded on All Sides by Water

Mon, 23 Feb 2026 00:00:00 GMT

Photo credit Mfwills, CC BY-SA 3.0. Fort Montgomery was one of only nine forts in the United States constructed with a moat, sharing that distinction with Fort Jefferson in Florida's Dry Tortugas. The moat, combined with Lake Champlain itself, meant the fortress was essentially an island accessible only by retracta...

Image: Mfwills | CC BY-SA 3.0

Fort Montgomery (Lake Champlain): Civil War Urgency

Mon, 23 Feb 2026 00:00:00 GMT

Photo credit Mfwills, CC BY-SA 3.0. Construction accelerated to a frenzied pace during the American Civil War, fueled by rumors that Britain might intervene against the Union from Canada. A detachment of the 14th U.S. Infantry garrisoned the fort for three months in 1862 to signal American resolve. Those fears prov...

Image: Mfwills | CC BY-SA 3.0

Fort Montgomery (Lake Champlain): Armed to the Teeth, Aimed at Canada

Mon, 23 Feb 2026 00:00:00 GMT

Photo credit Mfwills, CC BY-SA 3.0. Fort Montgomery was designed to hold 800 men, yet it was never fully garrisoned. Like many Third System forts, it served primarily as a deterrent -- a massive stone warning aimed squarely northward. By 1886, its peak armament year, the fort mounted 74 of its 125 cannon capacity, ...

Image: Mfwills | CC BY-SA 3.0

Fort Montgomery (Lake Champlain): The Fort Nobody Wants

Mon, 23 Feb 2026 00:00:00 GMT

Photo credit Mfwills, CC BY-SA 3.0. Fort Montgomery's later history reads like a dark comedy. The military abandoned it, and the property eventually passed into private hands. In the mid-1980s, the owner worked with local historical societies to have New York State purchase the fort for possible restoration. The st...

Image: Mfwills | CC BY-SA 3.0