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Discover
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Waterfalls
United States
Illinois

Jackson County

Rock Dam Spillway Rapids

Discover
Places to see
Waterfalls
United States
Illinois

Jackson County

Rock Dam Spillway Rapids

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Highlight • Waterfall

Rock Dam Spillway Rapids

This Highlight is in a protected area

Please check local regulations for:

Shawnee National Forest

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  • Location: Jackson County, Illinois, United States

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    November 24, 2025

    The name may be a mouthful, but it really does describe what you'll see here: A natural rock "dam" that separates Little Cedar Lake from Cedar Lake, creating a difference of several feet between the water levels of the two lakes. The result is a natural spillway that generates some modest rapids.

    On a typical day, you can pick your way across the rocks of the spillway/dam and cross the stretch easily and safely. When the water runs high, however, this crossing becomes unsafe and you'll need to detour around Little Cedar Lake to the south.
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    Elevation 130 m

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    Thursday 14 May

    22°C

    8°C

    0 %

    Additional weather tips

    Max wind speed: 6.0 km/h

    Location: Jackson County, Illinois, United States

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