Thomas Jefferson stood at the edge of the water in 1791, and the migraines that had plagued him simply vanished. He wrote to his daughter that Lake George was “without comparison the most beautiful water I ever saw,” its surface “limpid as crystal” and its mountain sides covered with rich groves down to the water’s edge. That letter became the first great advertisement the lake ever received, and for the next two centuries, Americans would associate this body of water with the word “limpid. ”

The lake had already been sacred to those who knew it first.

The Mohawk called it Andiatarocte. A French Jesuit missionary, Isaac Jogues, reached the water in 1646 and, overwhelmed by what he saw, named it Lac du Saint Sacrement, Lake of the Blessed Sacrament. The lake stretches 32 miles from south to north, drops to depths of nearly 200 feet, and is fed by massive underground springs. Because the surrounding granite does not leach phosphorus or nitrogen, the water has almost no natural fuel for algae.

It stays clear by nature, not by maintenance. New York State would eventually classify it as class AA special, the same designation given to drinking water, and thousands of people along the shore still draw their tap water directly from the lake. But for a century after Jogues arrived, nobody came to swim. They came to fight.

The lake was a natural highway between Montreal and New York City, and whoever controlled it controlled the corridor. The French built Fort Carillon at the northern end, and the British built Fort William Henry at the southern end. In 1755, colonial British Americans and Mohawk warriors under Sir William Johnson defeated a French army near the lake’s southern shore, and Johnson seized the area and renamed it Lake George after King George II. Two years later, the French commander Montcalm laid siege to Fort William Henry.

After days of bombardment, the British surrendered, and Montcalm promised them safe passage south. But as the British column retreated, Montcalm’s Native American allies, who had not agreed to those terms, attacked. The number killed remains disputed by historians, but the event became one of the most infamous massacres in colonial warfare. Decades later, James Fenimore Cooper used it as the backbone of The Last of the Mohicans, making the lake famous across the English-speaking world before the tourism industry even existed.

By the middle of the 19th century, the tourists had arrived. The first Fort William Henry Hotel opened in June 1855 on the bluff where the old fort had stood. It was a three-story monument to ambition, the facade lined with towering columns, the main building stretching 235 feet along the water. It was expanded the very next year, then sold in the late 1860s to hoteliers out of Albany who spent $200,000, a staggering sum approaching five or six million in today’s money, adding two stories, tripling capacity to 900 guests, and building a spectacular veranda along the entire lakeside frontage.

The grounds stretched across 30 acres and included a casino, tennis lawns, a stable, sailing docks, gardens so elaborate they required full-time staff, and a massive fountain. All of it existed because of the water. The steamboat era deepened the connection. The Lake George Steamboat Company, founded in 1817, ran vessels up and down the full length of the lake.

By the 1850s, the first Minnehaha, 144 feet long with a wood-fired walking beam engine, made daily round trips between the village and Ticonderoga. The boat and the hotel were so tightly integrated that the captain would blow the ship’s whistle once for every 10 passengers aboard as he approached the dock, so the hotel’s dining steward would know how many to prepare for dinner. By the late 1800s, the steamers were carrying over 110,000 passengers a season. When the Civil War started, summer tourism dropped and the company struggled, but after the war ended, the Delaware and Hudson Railroad bought the steamboat company, and suddenly the railroad and the boats were one system.

A tourist could board a train in New York City, ride it to the southern tip of the lake, step onto a steamboat, and cruise 32 miles to the northern end. The richest passengers looked at the western shoreline and thought, why stay at a hotel when I could build a palace? That is how Millionaires’ Row came to be. Along the western edge of the lake, industrialists and society figures erected palatial summer homes with dozens of ornate bedrooms and private boat houses.

Royal C. Peabody, founder of the Brooklyn Edison Company, built Wycogsko in 1895, a 13,000-square-foot mansion with eight bedrooms, seven fireplaces, a wine cellar holding 4,000 bottles, a 17-bay garage, an elevator, and a guest house. Theodore Roosevelt was such a regular visitor that he was hiking nearby Mount Marcy in September 1901 when a messenger scrambled up the trail to tell him that President McKinley had died from an assassin’s bullet. Roosevelt came down the mountain and took the oath of office.

At the center of this summer civilization stood the Sagamore. It opened in 1883 on Green Island, a 70-acre private island connected to the mainland by bridge. Then Lake George’s strange, almost cursed relationship with fire began. On the morning of June 27, 1893, with roughly 150 guests and employees asleep, fire broke out in the laundry building and spread too fast to contain.

The entire Sagamore burned to the ground in a single night. Miraculously, everyone escaped. The investors did not hesitate. Within five weeks, 90 men began rebuilding on the original stone foundations, and the second Sagamore opened roughly a year later, grander than the first, with Edison electric lights, telephones, a steam elevator, and its own power plant.

Twenty years of prosperity followed. Then, on Easter Sunday 1914, fire destroyed the Sagamore again. This time the rebuilding stalled. The resort sat dormant until 1930, when the third Sagamore finally opened with financial backing from a St.

Louis industrialist whose family had just bankrolled Charles Lindbergh’s transatlantic flight. The timing could not have been worse. The Sagamore opened at the start of the Great Depression. The depression crushed everything.

The steamboat company’s passenger counts dropped from 110,000 to 50,000 by 1933. The grand mansions on Millionaires’ Row were abandoned one by one. World War II nearly finished the job. The steamboat company scrapped two of its vessels because there were not enough passengers to justify keeping them in the water.

Lake George, by 1945, was something close to a ghost of itself. Then the automobile saved it. By July 4, 1945, more cars were parked on the streets of Lake George Village than anyone had seen since before the fighting started. The families who came now were middle-class and working-class.

Tourist cabins and roadside motels sprang up along the highway to meet them. In 1954, one full year before Disneyland opened, a man named Charles R. Wood built Storytown USA, a Mother Goose fairy tale park aimed at children. When a banker laughed at the idea and refused to finance the park, Wood reportedly replied, “One day, sir, I will be able to buy and sell you.

” Five years later he opened Gaslight Village in the heart of Lake George Village itself, a vaudeville-themed amusement park with a Ferris wheel, bumper cars, and live melodramas where the jokes were terrible on purpose. For 30 years, those parks, along with wax museums, miniature golf courses, arcades, and the ever-present steamboat cruises, defined the Lake George experience. Here is the hinge of the whole story. In 1954, the same year Storytown opened, the 46th National Governors Conference convened at the Sagamore Hotel.

Vice President Richard Nixon presided. The federal government’s representative delivered the announcement that mattered: the federal government was planning a new interstate highway system, and one of those highways, Interstate 87, the Adirondack Northway, would run straight to Lake George. The birth of the American Interstate system was announced inside the ballroom of the very resort that represented the dying era of steamboats and whole summers at the lake. The Northway reached Lake George by 1963.

Suddenly families from Albany and New York City and New Jersey could drive straight to the lake on a modern divided highway. Business exploded. The motels filled up. The theme parks thrived.

But the Northway was a double-edged sword. It bypassed Route 9, the old highway that had threaded through every small town between Albany and Montreal. For decades, Route 9 had been the busiest road from New York to Canada, and every town along it survived on through traffic. The Northway changed that overnight.

The interstate travelers zipped past, saving time but missing the little towns that had once been unavoidable. Some of those businesses never recovered. And the very forces that fueled the tourism boom were beginning to threaten the lake. The old Fort William Henry Hotel was demolished in 1969.

The Sagamore, which had burned twice and been rebuilt three times, closed its doors in 1981. Gaslight Village closed in 1989 and was eventually demolished to return the land to a natural state. Where the Ferris wheel once turned, there is now open ground. Water Slide World sat abandoned for four years after its creator died in 2018, until a developer bought the 12-acre property in 2022 and bulldozed everything flat.

The village had become a seasonal economy pretending to be a real community. School enrollment had been declining for years. A pizzeria owner estimated that 70% of his annual revenue came from the summer months alone; staying open through winter meant losing money. The water, the reason any of this exists, is changing.

Researchers have been monitoring the lake’s deep water for over 40 years. The water is still extraordinarily clear, but sodium concentrations have climbed from around 3 milligrams per liter to 10. Chloride levels have risen from 6 to 18. At present rates of increase, the deep water could reach the EPA sodium guideline for safe drinking water within 50 years.

The source is road salt, sodium chloride, spread every winter on highways and parking lots throughout the watershed. And the road that brings the salt is the Adirondack Northway, the same highway announced at the Sagamore in 1954, the road the community celebrated as their economic salvation. Because Lake George has a very long water retention time, what goes in does not come back out. It just accumulates.

Salt is not the only invasion. Eurasian water milfoil, an aquatic weed that grows an inch a day in summer, has spread through multiple bays. Asian clams were first discovered in 2010. Zebra mussels, spiny water fleas, Chinese mystery snails, curly-leaf pondweed, the list keeps growing.

And in the fall of 2023, Lake George experienced its first documented harmful algal blooms. They were small and non-toxic, but their appearance on a lake that had never had one, a lake whose entire identity and multi-billion-dollar economy rests on the proposition that its water is clean, sent a genuine shudder through the scientific and business communities alike. A woman named Carol Collins, who had done her doctoral research on the very species of cyanobacteria she now saw floating in her own lake, said, “It’s sad for Lake George, but it’s not something we didn’t expect. ”

The causes overlap and compound.

Aging lakeside septic systems leak sewage. Fertilizer running off lawns feeds the algae. Climate change is warming the surface water. And the salt itself changes the water chemistry in ways that may give invasive species an advantage over native ones.

The Jefferson Project, a collaboration with Rensselaer Polytechnic Institute and IBM, has outfitted the lake with more than 500 environmental sensors to monitor human influence in real time. A road salt reduction initiative launched about 10 years ago is beginning to show results in the tributaries, but the lake itself responds slowly because its retention time is so long. The salt already in the deep water is not leaving anytime soon. The economics keep shifting.

In 2023, Lake Placid surpassed Lake George in year-over-year tourism spending growth for the first time. Canadian tourism, always a vital source of summer revenue, dropped sharply in 2025, with some restaurant owners reporting 40 to 50% fewer Canadian diners. In the summer of 2025, a visitor walked into the Great Escape Theme Park and found no lines at all. By early 2026, Six Flags sold the park as part of a $331 million deal.

Charles Wood’s creation, the park he opened a year before Disneyland, is now on its third corporate owner. The village did receive $10 million in state downtown revitalization funding, and the cleared site where Water Slide World once stood was zoned for tourism-related development, waiting for someone to imagine what comes next. As of late 2025, it was still an empty lot. There is something fitting about a story from a century ago.

In 1904, a painter named Harry Watrous carved a 10-foot sea monster out of a cedar log, red fangs, huge eyes, a gaping mouth, whiskers made from frayed hemp rope. He rigged it with a pulley system so he could raise and lower it in the dark waters, moving it around the lake at night to generate headlines and genuine panic. Dozens of people swore they had seen a living sea serpent. Watrous let the fear build for years before confessing everything in the 1930s.

Everyone looked at the same water. Everyone saw something different. The water never promised any of them anything. It was just clear.

Today, on a summer afternoon that looks almost exactly like a summer afternoon in 1908, the steamboat Mohican, built that year and still running, makes its way up the lake. She passes the island where the Sagamore has burned and risen three times. She passes the bays where the milfoil grows an inch a day beneath a surface that still looks pristine from the deck of a boat.

Somewhere down there in the deep water, the sodium count ticks upward, one milligram at a time.