Keller Lake County Park: Five Months After the Flood
Tuesday, September 29th turned out to be a crisp, partly sunny fall day here in Waupaca County. It felt like the right afternoon to head up toward Marion and visit Keller Lake County Park, catch some fresh air, and get a firsthand look at how the park is holding up five months after the brutal storm system that swept through northeast Wisconsin in mid-April.
Above the dam, the water was calm and glassy under the clouds. Thick woods line both shorelines, with early splashes of autumn yellow just beginning to feather through the green canopy.
As soon as you walk toward Keller Dam, the quiet mood completely changes. The South Branch Pigeon River tumbles over dark stone ledges and granite boulders here, kicking up lively white water rapids as it rushes through the channel.
What the April flood left behind
The storm that did the real damage hit on April 13 and 14, 2026. The destructive flooding ramped up overnight from Monday, April 13 into Tuesday morning, April 14, dumping torrential rain across the region and turning quiet northern streams into raging torrents. At Keller Lake, the volume of water simply overwhelmed the ground adjacent to the dam.
Walking the grassy path near the impoundment today, the scale of that erosion is immediately obvious. A massive portion of the earthen embankment right alongside the concrete retaining wall was carved out, leaving a deep chasm between the water and the wooded slope.
The paved asphalt access road took an absolute beating. The roadway was sheared clean in two, abruptly dropping off into thin air where the supporting ground gave way beneath it. A length of bright orange construction fencing stands near the edge to keep visitors back from the drop-off.
Looking down into the washout hole, you can see heavy slabs of fractured blacktop, loose dirt, and boulders piled up at the base of the concrete wall. The hydraulic force it took to undermine that much pavement and displace that much earth in a single night is hard to overstate.
From above, you get a clear look at the structural distress along the concrete dam itself, with deep scouring and collapsed material lining the water’s edge below.
Another angle along the retaining wall highlights just how far the roadbed gave way into the rocky hillside.
The stone bridge and early fall color
Even with the scars around the dam waiting on engineering and long-term repairs, Keller Lake County Park hasn’t lost any of its quiet beauty. Just downstream from the washout, the river flows under a rustic stone bridge, framed by autumn leaves that are beginning to drift down onto the mossy rocks.
The rapids tumble over rock ledges beneath the bridge with a steady rush. It’s the kind of spot where you can easily spend half an hour just watching the water weave through the dark stone channels and swirl yellow leaves through the eddies.
Looking through the tree trunks along the bank, the forest canopy creates a peaceful frame over the stream. The mix of lingering summer green with crisp shades of yellow and gold gives the whole area that distinct late-September character.
Right at the splash line, the rocks are coated in vibrant green moss, with fallen brown and yellow leaves tucked into every wet crevice.
Further down the gorge, the rapids cascade through dark stone ledges before the woods close in around the river.
There is a striking contrast here between the sheer muscle of running water and its quiet natural beauty. Up at the dam, you see the raw power that tore away tons of roadbed and dirt overnight. Just a few steps downstream under the stone bridge, that same water is washing over moss and boulders that have been sitting there for a hundred years. It is going to take real work and funding to rebuild that road and stabilize the embankment, but on a partly sunny fall afternoon, Keller Lake is still a wonderful place to spend a few hours.
