Something Is Watching in Okoboji Lake… and People Won’t Talk About It

Lake Okoboji Serpent

If you’ve ever dipped your toes in West Okoboji Lake, you’ve probably felt that little jolt when something brushes against your ankle. A strand of seaweed, maybe a fish, or… something else.

 

Something long. And scaly. And watching.

 

The locals will tell you it’s probably just the Okoboji Serpent. Then they’ll smile, like they’re kidding, but maybe not.

 

Ever since white settlers arrived in the Iowa Great Lakes region, there’ve been whispers about something big—very big—lurking beneath the blue-green waves of Okoboji. Something that leaves waves when there’s no boat, casts shadows longer than any muskie, and with a head like a horse, a neck like a garden hose, and a tail that goes on forever.

Call it a sea monster, a hoax, or a marketing gimmick for summer tourism.

 

The stories won’t go away.

 

Let’s set the scene.

 

West Okoboji Lake is a glacial lake—deep, cold, and dazzling blue. It’s a vacation hotspot, dotted with lake homes, pontoon boats, and families who’ve been coming for generations. You can swim, fish, ski, sunbathe, and dance the night away at Arnold’s Park Amusement Park, which has been spinning teenagers around since 1889.

 

But beneath the surface, there’s always been something a little strange about the lake. Fishermen report odd shadows under their boats. Divers feel they’re being watched. Swimmers sometimes hear splashes in the distance that don’t match the ripple of waves.

(vintage postcard, circa 1915 - colorized)

And every so often, someone sees… it.

 

The first recorded sighting of the Okoboji Serpent dates to the 1890s. A group of farmhands, out fishing for bullhead, saw something surface near their boat—something that “resembled a snake with the head of a dog” and was “longer than a wagon.”

 

They rowed to shore as fast as they could and told the general store owner, who told the postman, who told everybody else. For the rest of the summer, folks stayed closer to shore.

 

Will Ruvane and Paul Davis went fishing near Arnold’s Park in 1898. They returned with no fish, but a big story. The Waterloo Courier said they made the first sea serpent sighting of the season. It was twenty feet long, two feet in diameter, and had something like a tent on its back, and large bones protruding from its sides. It disappeared when it saw them.

 

In 1905, the Davenport Democrat and Leader ran a story about Billy Chamberlain. He was out on the lake when he saw a sea serpent. “A great big hideous creature with green eyes and husks covering its head.”

 

It swished its tail, and the waves engulfed his boat. Billy washed up on shore minutes later, one step ahead of the beast.

 

He ran back to the resort and recruited some men to search for it. All they found were a dozen empty “Three Star Hennessy” bottles, one with a tiny garter snake in it.

 

When pressed for an explanation, all Billy could say was: “It was a big sea serpent when I saw it, but the sun has dried it up and it has shrunken since then.”

 

Nice save, Billy.

 

In the 1920s, the lake became a playground for city folk looking to escape the heat. Tourists arrived by train from Des Moines and Chicago, and the monster rumors picked up.

 

In 1922, the Spirit Lake Beacon ran a story about a man named Roy Gunderson who saw a serpent swimming between Pillsbury Point and Manhattan Beach. It was “dark brown, slick as oil, and moving like a whip.” Its head rose several feet above the water, and it made no sound—just glided silently like it owned the lake.

 

Gunderson wasn’t the only one.

 

Lorna Hamm, a local teacher, wrote a letter to the editor saying she’d seen “something long and thick” roll just beneath the surface while she was canoeing. She didn’t want to cause panic, but… she wasn’t going swimming again. Not any time soon, anyway.

 

The sightings triggered a minor panic. Boat rentals dipped. Beachgoers refused to go in deeper than their knees. The lake resorts printed cheeky flyers, challenging customers to, “Catch the Okoboji Serpent—Free Beer If You Do!”

 

The serpent didn’t appear again that year.

 

Over the decades, explanations for the Okoboji Serpent have piled up like folding chairs in a marina.

 

It’s a giant muskie. These fish can grow to five feet or more and look like prehistoric beasts. But even the biggest muskie doesn’t have a long neck or pop its head out of the water to sightsee.

 

It’s a log. Driftwood can float, bob, and move in ways that seem uncanny, especially when a breeze is involved, but again, logs don’t swim. Or dive.

 

 

It’s gas bubbles. Some scientists suggest rotting vegetation releases methane bubbles that create movement on the water’s surface, but that doesn’t explain the glowing eyes one teenager swore he saw in 1959.

 

It’s a prank. Possibly. In fact, in 1967, a group of college students from Iowa State admitted to tying a carved dragon head to a series of inner tubes and towing it behind a boat, but their prank only added fuel to the legend.

 

It’s real. Just not what you think. A surviving relic of some ancient reptile. A mutant. A displaced eel from Lake Michigan. A cryptid that swims in from deeper waters through underground channels no one’s mapped.

 

And then, of course, there’s the old standby: “I don’t know what it was, but I saw it.”

 

Campers have been telling stories about the serpent for decades. Counselors pass it down like a sacred rite: “Don’t swim past the buoy unless you want to meet Old Okie.” He’s cranky during storms, friendly if you hum, and he once followed a girl all the way back to the dock without her noticing.

 

Some versions of the story make him a lonely lake spirit, a sort of Iowa Loch Ness. Others say he’s the guardian of the lake, punishing people who litter or take more than they need.

 

There’s even a children’s book, sold at souvenir shops with plush serpent toys and coloring books, but don’t let the googly eyes fool you. Some people still say he’s out there, and not always friendly.

 

Interestingly, legends of lake serpents weren’t new to the Iowa Great Lakes region. Long before the resorts and roller coasters, the Dakota and Ho-Chunk people spoke of spirits in the water—some benevolent, some dangerous.

 

The word Unktehi appears in Dakota lore as a horned water serpent that lived in lakes and caused storms when angered.

 

In some stories, Unktehi was a guardian of balance. In others, a wrathful monster dragged warriors to the bottom. Could the Okoboji Serpent be a distant cousin to these ancient tales? Maybe. Or maybe it’s just a cultural echo—one that never stopped rippling.

 

The most recent sighting came in 2002. A man was fishing off a dock near Smith’s Bay just after dusk. He saw something breach the water fifty yards out— “like a tire rising up, but longer and alive.” It moved in a side winding motion, then sank without a splash.

 

He wasn’t drunk. He wasn’t looking for attention. “I’ve lived here forty years,” he said. “I know what a beaver looks like. That wasn’t a beaver.”

 

The story ran in the Sioux City Journal and was followed by other anonymous claims. A local teen saw it, but her parents told her not to talk about it. “They don’t want the news vans again,” she said.

 

Which raises an interesting point: maybe people are still seeing something. They just know better than to talk about it.

 

If you ask a local, most will chuckle and say, “Oh, that old thing?” Then they’ll pause, just long enough to make you wonder.

 

The Okoboji Serpent may be a myth, but it’s a myth rooted in place.

 

It’s a story that belongs to summer. To kids on rafts. To fishermen in silence. To when the lake is still and the only sound is your breath—and then something breaks the surface.

 

Real or imagined? It doesn’t matter, because once you hear the story, you’ll never swim quite the same way again.

One More Thing

 

If you like this kind of stuff—authentic stories, not the cleaned-up versions—I’ve put a bunch of them together in Iowa Crime Time.

 

No hype. No over-the-top storytelling. Just what happened.

 

If you enjoy it, consider tossing a few bucks in the tip jar. It helps keep this thing going.

 

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