The Drowned Quarry: A Day and a Night at Harrington Beach State Park

Some places you visit once and check off a list. Others get under your skin, and you find yourself driving back to them year after year, in different seasons, at different hours, just to see what they look like in a new light. Harrington Beach State Park is one of the second kind for me. It’s a bit of a haul from home — the better part of a couple hours down the Lake Michigan shore — but I’ve made the trip more than once now, and I keep finding reasons to go back.

On the surface, the pitch is simple: more than a mile of Lake Michigan shoreline, a quiet 26-acre lake you can walk all the way around, deep hardwood woods full of ferns, and some of the best dark skies in southeastern Wisconsin. But the part that keeps pulling me back is what’s hiding just under that quiet lake. Because the lake isn’t natural. A little over a hundred years ago it was a working stone quarry, and a whole company town lived and worked on its edge. When the digging stopped, the water came in and swallowed the works whole. On a calm, clear day you can still look straight down through the water and see the bones of it — old timbers standing exactly where the men left them in 1925.

That’s the thing I want to walk you through in this post. The beach, the woods, the plants, the wildlife — all of it is worth the drive on its own. But the quarry is the heart of the place, and once you know its story you can’t unsee it.

Where It Is, and Why It’s Worth the Drive

Harrington Beach sits in the Town of Belgium, in Ozaukee County, right on the Lake Michigan shoreline north of Milwaukee. If you’re coming down from the Fox Valley like I am, it’s not a quick run to the corner store — you’re committing to a real drive. But that’s part of what makes it feel like a getaway rather than an errand. By the time you turn off the highway and roll down the park road under the trees, the rest of the day has already fallen away behind you.

The park covers about 715 acres, and the nice thing is how much variety they packed into that space. You’ve got the big lake on one side — Lake Michigan, which on the right day looks more like an ocean than anything you’d expect in Wisconsin — and the little lake, the old quarry, tucked back in the woods. In between there’s cedar swamp, hardwood forest, old farm fields that have been let go back to grassland and wetland, and a mile-plus of shoreline. You can spend a whole day here and never feel like you’re walking the same ground twice.

One bit of trivia I love: the park isn’t named after a beach or a town or a founding family. It’s named for C. L. Harrington, who was Wisconsin’s first superintendent of state parks. The state established the park in 1966 and the DNR started buying up the old quarry properties a couple of years later, in 1968. So the name is really a tip of the hat to the whole idea of state parks in Wisconsin — the notion that places like this ought to be held in common and kept wild for the rest of us. I think about that every time I pull in.

The Shoreline

This is the part of the shoreline I keep photographing. When most people picture Harrington Beach they picture the main swimming beach — that long, soft, sandy stretch where families set up for the day in summer. And that beach is genuinely great. But if you keep walking past the crowds, the shore changes character completely. The sand gives way to wide, flat shelves of pale limestone, the bluff behind you starts to crumble, and whole trees lean out and finally fall onto the rocks, bleached gray and stripped bare by the water and the weather.

I find this stretch more interesting than the postcard beach, honestly. That flat rock you’re standing on is dolomite — a hard, magnesium-rich limestone — and it’s the exact same stone that built this whole story. The quarry back in the woods was dug to get at this rock. Here on the shore you’re just seeing the natural version of it, scrubbed clean by a few thousand years of waves. If you slow down and look closely at the ledges, you can sometimes spot the faint shapes of ancient sea life in the stone. This entire region was a shallow tropical sea hundreds of millions of years ago, and the dolomite is basically the compressed leftovers of it. There’s something humbling about standing on a beach that used to be the bottom of an ocean.

Lake Michigan sets the mood, and the mood changes by the hour. The day I took the photo above, the water was calm and the sky was a soft, flat gray, and the whole place felt hushed. Come back on a windy afternoon and the same shoreline is loud and alive, with waves slamming the rock ledges and throwing spray. I’ve learned not to have expectations about what the lake will be doing when I arrive. Whatever it’s doing, it’s worth watching for a while.

There’s history out in that water, too. Somewhere off this shore lies the wreck of the Niagara, a wooden steamer that caught fire and burned just off the coast back in 1856, long before anyone was quarrying stone here. You can’t see it from the beach, but I like knowing it’s out there. This whole stretch of coast has been quietly collecting stories for a very long time.

Into the Woods, and the Ferns

Turn your back on the lake and walk into the woods, and the whole feel of the park flips. The open, bright, windy shoreline gives way to something cool, green, and close. And in early summer, this is what the forest floor looks like — a solid, unbroken carpet of ferns as far as you can see, glowing in that almost electric shade of green that only seems to happen in June.

I’m no botanist, but I’ve spent enough time in Wisconsin woods to recognize a healthy fern colony when I’m standing in one. A lot of what you’re seeing here are the big, vase-shaped fronds that love damp, rich, shady ground — the kind of conditions you get all through this part of the park, where the soil stays moist and the canopy keeps things cool. Ferns are some of the oldest plants on the planet, far older than the flowers and the grasses, and there’s something prehistoric about wading through a field of them. It’s easy to imagine you’ve stepped a few hundred million years back in time.

The ferns are the show-stopper, but they’re not the whole story underfoot. A big piece of this park is a white cedar swamp — a low, wet hardwood-and-cedar forest that’s become rare in a lot of places but still thrives here. White cedars are those shaggy, fragrant evergreens that grow in the wettest ground; some of them in woods like this are far older than they look, because they grow so slowly in the cold, soggy soil. Walk the trails and you’ll move through cedar, maple, birch, and beech, with the light coming down through the leaves in soft patches.

If you come earlier in the spring, before the ferns take over, the same ground puts on a completely different show. That’s when the spring wildflowers come up — trilliums, violets, the little ephemerals that have to bloom fast and soak up the sun before the trees leaf out and shut off the light for the season. By the time the ferns are this thick, those flowers have already done their work and faded back. It’s one of the reasons I like coming back at different times of year. The park I walk in early May is not the park I walk in late June, even on the exact same trail.

The woods are alive with things to notice if you keep your eyes and ears open. White-tailed deer are common, and you’ll often catch one freezing and watching you before it bounds off. The bird life is excellent — this is a well-known spot for birders, especially during migration, when the lakeshore acts like a highway and a rest stop for birds moving up and down the coast. I’m the kind of person who stops to listen rather than to identify every call, but even a casual walk here is full of song. Squirrels, chipmunks, the occasional fox or coyote sign, frogs and turtles down by the water — there’s always something.

A Closer Look at What’s Growing

I want to spend a little more time on the plants here, because the variety is a big part of what makes the place special, and it’s easy to walk right past it if you’re only looking at the lake. In a single visit you can move through three or four completely different plant communities without ever getting in your car, and each one has its own cast of characters.

Start at the water. Out on the open Lake Michigan shore, the plants are the tough ones — the survivors that can handle wind, salt spray, blazing sun, and shifting sand and rock. You’ll see beach grasses anchoring what sand there is, low scrubby growth clinging to the edge of the bluff, and the gnarled, wind-bent trees that lean out over the rocks before they finally give up and fall. Nothing soft grows out here. Everything is built to take a beating from the lake.

Step back off the shore and into the forest and the whole palette softens. This is where the ferns take over, and they really do take over — in early summer the ground disappears under them. Ferns thrive here because so much of this ground stays cool and damp, shaded by the canopy and fed by the high water table that’s never far below the surface. Mixed in with the ferns, depending on the season, you’ll find the wildflowers: the early-spring ephemerals that race to bloom before the leaves close in overhead, and then the shade-lovers that carry on through summer down on the dim forest floor.

The real botanical treasure, though, is the white cedar swamp. Northern white cedar is a slow, patient tree that grows in the kind of cold, wet, low ground that would drown most other species. A cedar swamp like this one is a special habitat — the trees grow close and shaggy, the ground underneath is a spongy mat of moss and roots, and the air has that clean, resinous cedar smell that I’d know with my eyes closed. These wetlands do enormous quiet work, too, filtering and holding water, and they shelter plants and animals you simply won’t find out in a dry field. When you’re walking the low, wet sections of trail and the evergreens close in around you, that’s the cedar swamp, and it’s worth slowing down for.

Then there are the old fields. Parts of the park were farmland and quarry property before the state took over, and rather than try to force them back into forest overnight, the DNR has managed a lot of that open ground as grassland and restored wetland ponds. That gives you yet another plant community — the prairie grasses and meadow wildflowers that pollinators and grassland birds depend on. So in the span of one walk you go from beach-edge survivors, to deep fern-and-cedar forest, to open sunny grassland and pond edges. For a park you can cross in an afternoon, that’s a remarkable spread of living things, and it’s the main reason the bird life is as good as it is. Different plants pull in different birds, and Harrington Beach has a little of everything.

The Quarry

And here is the heart of the place. This is Quarry Lake, and the first time you walk up on it, the water stops you in your tracks. It’s clear in a way that lakes around here usually aren’t — you can look straight down through it and see the broken slabs of stone on the bottom. And then you notice the wood.

Those weathered posts standing up out of the surface are the tops of old wooden pilings. Follow them with your eye and you’ll see the rest: long timbers lying across the bottom in a deliberate grid, beams and frames laid out by human hands, marching out from the shore into deeper water. It does not look natural, because it isn’t. You’re looking at the actual skeleton of a quarry operation that shut down a hundred years ago, sitting on the bottom of the lake that drowned it.

When I first stood here I had the same question a lot of people have, and the same question I jotted into my own notes for this post: what exactly is all that wood down there? So I went and dug into the history of this spot, and the answer turns out to be one of the best stories in any state park in Wisconsin.

The Lost Town of Stonehaven

For about thirty-five years — from the 1890s until 1925 — this peaceful lake was a loud, dusty, working dolomite quarry. The dolomite here was good, hard stone, the kind that gets crushed for road building, for concrete, for construction, and there was money in pulling it out of the ground and shipping it down the lake to growing cities. Starting in 1901, a company called the Lake Shore Stone Company ran the operation, and they didn’t just dig a hole — they built an entire community around it.

They called the town Stonehaven. At its peak, somewhere around 150 people worked in and around the quarry, and many of them lived right here with their families. A lot of those workers were immigrants — people who had come from Luxembourg, from the Austro-Hungarian Empire, from Italy, chasing steady work in a new country. They lived in company housing, and the place had the bones of a real village: homes, a store, the rhythms of an ordinary working town, all built on the edge of a stone pit on the Lake Michigan shore.

The work itself was hard and ingenious in equal measure. Down in the pit, mules pulled carts loaded with broken rock along tracks, hauling stone from wherever it was being worked to one central spot. At that spot the mule was unhitched, and a cable system took over, dragging the loaded carts up a ramp to the crusher. The crusher broke and sorted the rock into three different sizes, and from there the finished stone was loaded out and shipped — including out onto Lake Michigan itself, by way of a long pier that ran some 700 feet out into the water. Think about that the next time the “commute” feels rough: men coming here day after day to break stone by the ton, in a pit on the edge of one of the biggest lakes on earth.

There was one constant enemy the whole time the quarry ran: water. The pit was dug down below the natural water table, which means the ground wanted to fill it back in every single day. The only thing that kept the quarry dry and workable was pumps — pumps running more or less around the clock, fighting the groundwater that was always trying to seep in. As long as the company ran the pumps, the pit stayed open. The day the pumps stopped, the clock would start.

That day came in 1925. The company was dissolved, the property was sold off, and the pumps were shut down for good. With nothing holding it back anymore, the groundwater did exactly what it had always wanted to do — it came up and filled the pit. The 45-foot-deep quarry flooded, the works went under, and the loud, dusty operation went quiet under the rising water. Some of the houses from Stonehaven were physically picked up and moved into the nearby Village of Belgium, where a few of them reportedly still stand. The town, as a town, simply ended.

It’s worth sitting with that for a second, because it’s easy to read “the town ended” as a tidy line in a history book and miss what it actually meant. These were real families — people who had crossed an ocean for steady work, who raised kids here, who knew the sound of the crusher running and the boats loading at the pier the way I know the sound of my own neighborhood. And then the work dried up, the company folded, and the whole community scattered or moved their very houses down the road to Belgium. A generation’s worth of daily life on this spot, packed up and gone, with the lake quietly rising over what was left.

And then, for forty years, the place was mostly left alone, slowly going wild again, until the state stepped in and turned the old industrial site into the park we have today. The wood under the water isn’t the only thing that survived, either — the foundations of some of the old quarry buildings are still here on land, half-swallowed by the woods now. If you keep an eye out as you walk, you can spot the occasional straight line of old stone or concrete where something used to stand. The forest has done its best to take it all back, but it hasn’t quite finished the job.

So What Is the Wood Under the Water?

Now we can come back to my original question, because the answer is sitting right there in the history. The timbers you see standing and lying under Quarry Lake are the remains of the quarry’s own wooden infrastructure — the working framework of the operation, left behind when the pumps shut off and the water rose.

A quarry like this was full of heavy timber. There were wooden cribs and pilings driven into the ground to support tracks, platforms, and equipment; framing for the loading and docking works; the timber footings that held up structures around the crusher and the cable ramp. All of it was built right down in and around the pit. When the water came up in 1925, it didn’t wash any of that away — it simply rose over it and submerged it where it stood. The grid of beams you can see on the bottom, and the cut-off posts breaking the surface, are that framework, sitting almost exactly where the workers last touched it.

The reason it’s still there, a full century later, is the water itself. The same cold, clean, mineral-rich water that makes the lake so clear is also a remarkable wood preservative. Down deep there’s very little oxygen and very little of the warmth and bacteria that would normally rot wood away. It’s the very same reason the Great Lakes are famous for preserving shipwrecks so perfectly — cold fresh water just doesn’t let things decay the way the ocean does. So these quarry timbers have been quietly waiting under the surface since 1925, refusing to rot.

I’ll be honest about the limits of what I can tell you: I can’t point at one specific beam and promise you it was the base of the crusher versus part of the dock versus a length of crib supporting the rail. There’s no little plaque underwater labeling each piece. But there’s no real mystery about what it all is. It’s the wooden skeleton of the Lake Shore Stone Company’s quarry, preserved in cold clear water and visible to anyone who walks the shore on a calm day. You’re looking at industrial archaeology that you don’t even have to dig for. The lake dug it up — or rather, buried it in plain sight — for you.

That’s the thing I can’t get over about this lake. It’s beautiful and peaceful and great for fishing, and most people who walk around it are just enjoying a pretty body of water. But it’s also a flooded ruin, a whole vanished livelihood sitting a few feet under the surface. Both things are true at the same time, and standing on the shore you get to hold both of them at once.

And make no mistake, it really is a living lake now, not just a museum piece. Fed by clean, cold groundwater and stocked by the DNR, the quarry has become a genuine little fishery, and on a nice day you’ll find people fishing the shoreline for trout and panfish. That same clarity and depth that lets you see the old timbers has also made the quarry a draw for scuba divers, who go down to explore the submerged works up close — imagine swimming through a hundred-year-old quarry frame forty feet down in water that clear. Frogs, turtles, and waterfowl have all moved in along the edges. Life didn’t just grow over the old quarry; it moved right into it and made itself at home. There’s a kind of justice in that, the way a place built to tear stone out of the earth is now one of the most peaceful spots for miles.

The Quarry at Night

If the quarry is striking by day, it’s something else entirely at night. I took the photo above on a December evening, and I want to point out what you might not catch at first glance: this is the middle of December in Wisconsin, and the water still hadn’t frozen over. With a little light on it, the whole submerged framework lights up under the black surface — that lattice of old timbers, the pale tops of the pilings glowing, the bare branches of a leaning tree caught in the glow. It’s genuinely a little eerie, in the best possible way. It looks like the ribs of something sunken, which is more or less exactly what it is.

Coming here after dark isn’t just about the quarry, though. It turns out Harrington Beach is one of the better stargazing spots in this whole corner of the state, and that’s not an accident. Tucked into the park is the Jim and Gwen Plunkett Observatory, run by a group called the Northern Cross Science Foundation. It’s a real observatory, not a token telescope on a post — it houses a 20-inch telescope that weighs over a ton, sitting under a roll-off roof that literally rolls away on heavy rails to open the whole building to the sky.

The observatory was dedicated back in 2007, and the volunteers who run it hold public viewing nights through the warmer months, free to anyone who comes out. The reason an observatory ended up here is the same reason the night photo works at all: it’s dark. Get away from the city glow of Milwaukee, out on this stretch of shore, and the sky opens up in a way most of us just don’t get to see from our own backyards anymore. Standing in a quiet park, looking up at a sky full of stars, with a flooded hundred-year-old quarry glinting in front of you — that’s a combination you don’t forget.

If you ever get the chance to come out for one of the public observatory nights, take it. And even if there’s no event on the calendar, a clear night up here is worth the drive all by itself. Just be sure you know the park’s hours and rules before you plan an after-dark visit, and bring more layers than you think you need — the wind comes off that big lake cold, especially once the sun is gone.

Things to Look For Through the Seasons

One of my favorite things about Harrington Beach is that it’s a genuinely different park in every season, and I’d encourage you to treat it that way rather than as a one-and-done summer trip.

In spring, the woods wake up first. The spring wildflowers carpet the forest floor before the trees leaf out, the migrating birds pour through along the lakeshore, and the whole place has that wet, green, just-thawed smell. The quarry water is cold and clear, and the leafless trees make it easier to see across the lake to the far shore.

In summer, the beach is the star — that long sandy main beach is a great place to spend a hot day on the lake — and the ferns hit their peak in the woods. This is also prime time for the observatory nights and for walking the full loop around the quarry, when the water is at its clearest and you’ve got the best shot at seeing the timbers down below.

In fall, the hardwoods turn, the crowds thin out, and the cooler air over the warm lake can do dramatic things with mist and light. It’s my favorite time to walk here, with the leaves coming down and that particular quiet that settles over Wisconsin parks once the summer rush is over.

And in winter, as that December photo shows, the place takes on a stark, beautiful starkness. Some years the quarry freezes and some years, like the one I photographed, it stubbornly stays open water well into the cold. The bare trees, the gray lake, the snow on the rock ledges — it’s a moodier park in winter, and well worth bundling up for if you don’t mind the cold.

If You Go

A few practical notes, since I’ve gotten the questions before. Like all Wisconsin state parks, Harrington Beach requires a vehicle admission sticker, which you can pick up at the entrance — either a daily pass or an annual one if you’re the kind of person who’s going to be hitting the state parks all year (and if you are, the annual sticker pays for itself fast). The park has a welcome center, restroom facilities, picnic areas, and walk-in and cart-in campsites if you want to make a night of it.

The main beach is the spot for swimming and laying out on the sand. The quarry is open for fishing and is stocked, and walking the loop around it is the must-do hike — it’s relatively easy and the payoff is constant. Give yourself time to actually stop along the quarry shore and look down into the water rather than just powering through the loop for exercise; the whole point is what’s under the surface. Bring sturdy shoes if you plan to scramble out onto the rock shelves along Lake Michigan, because that flat dolomite can be slick where the water reaches it.

Most of all, give yourself more time than you think you’ll need. The first time I came I treated it like a quick stop and ended up wishing I’d planned the whole day around it. There’s the beach, the woods, the quarry, the history, and the night sky, and trying to cram all of that into an hour just doesn’t do the place justice.

Why I Keep Coming Back

When I step back and ask myself why this particular park has its hooks in me, I think it comes down to the layers. Most pretty places are pretty in one way. Harrington Beach is pretty in about five ways at once, and they don’t cancel each other out — they stack.

There’s the raw, open beauty of Lake Michigan, big and moody and never the same twice. There’s the deep, green hush of the cedar swamp and the fern woods. There’s the night sky, dark enough to remind you what you’ve been missing under the city lights. And underneath all of it, literally, there’s the human story — a hundred and fifty people who lived and worked at a place called Stonehaven, dug a fortune in stone out of the ground, and then watched the water take it all back the moment they stopped fighting it.

That’s what I think about as I walk the loop. We took the stone out, and the water moved back in, and now there’s a forest full of ferns and a lake full of birds growing over the top of what used to be the loudest place for miles. The town is gone, but its bones are right there under the surface, perfectly preserved, waiting for anyone who slows down enough to look. Nature didn’t erase what happened here. It just grew a beautiful park over the top of it and left the door open for the rest of us to come see.

So that’s my pitch. If you’re anywhere near the Lake Michigan shore in Ozaukee County with a free day, point the car at Harrington Beach State Park, bring good shoes and a little curiosity, and go stand on the edge of the drowned quarry for a while. I’ll probably see you there — I’ll be the guy crouched at the waterline, staring down at a hundred-year-old timber and grinning like I just found buried treasure. Because in a way, I did.

A note on this one: I wrote the original draft and took all the photos myself on visits to the park, then leaned on a little AI help to research the quarry’s history and polish the writing into the longer piece you just read. The story of Stonehaven, the Lake Shore Stone Company, and that wonderful old wood under the water is all real — go see it for yourself.