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Winnewana Impoundment

Washtenaw County, Michigan Inland Lake Connected Water
1 launchRec Passport required
Winnewana Impoundment Access Map 1 launch
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Boat Launches on Winnewana Impoundment
Winnewanna Impoundment Boat Launch
Waterloo State Recreation Area (PRD) · Unimproved ramp, 1 lane, 4 trailer spots
Open Motorboat Kayak Rec Passport
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Connected Waterways

Winnewana Impoundment sits within the Waterloo State Recreation Area, which contains dozens of lakes and wetlands connected by streams and marshland in the headwaters region between the Grand River and Huron River watersheds. The impoundment itself is a dammed section of local waterway — typical of the small reservoirs scattered throughout this glacially shaped landscape.

Winter & Ice Safety

As a small impoundment, Winnewana likely freezes relatively early and reliably in a typical Michigan winter. Always verify ice thickness yourself — 4 inches of clear ice minimum for foot traffic, 5–7 inches for snowmobiles or ATVs.

Frequently Asked Questions
Where is Winnewana Impoundment?
Winnewana Impoundment is in Washtenaw County within the Waterloo State Recreation Area, roughly between Chelsea and Grass Lake in southeastern Michigan. It's about 30 minutes west of Ann Arbor.
Is there a boat launch on Winnewana Impoundment?
Yes, there's one small boat ramp. It's a basic launch best suited for small boats, canoes, and kayaks — you back your trailer down to the water. Not ideal for larger vessels.
Is there a fee to launch at Winnewana Impoundment?
The launch is within Waterloo State Recreation Area, so you'll need a Michigan Recreation Passport ($17/year for Michigan plates, $34/year for out-of-state). No separate launch fee beyond that.
Are there campgrounds near Winnewana Impoundment?
Several, all within the Waterloo State Recreation Area. Green Lake Rustic Campground and Sugarloaf Lake Campground are nearby, plus Mill Lake cabins and the Waterloo Equestrian Campground. It's one of the most campground-dense areas in southern Michigan.
Can you swim in Winnewana Impoundment?
There's no designated swimming beach on Winnewana itself. For swimming, head to nearby Waterloo State Recreation Area beaches or Clear Lake County Park, both a short drive away.
Can you kayak or canoe on Winnewana Impoundment?
Absolutely — the small size and low boat traffic make it a solid paddling spot. The single ramp provides easy put-in access for kayaks and canoes.
Can you ice fish on Winnewana Impoundment?
As a smaller, shallow impoundment it likely freezes reliably in winter, and ice fishing is common on lakes throughout the Waterloo Recreation Area. Always check ice thickness before heading out.
Scout's Notes
Lake Vibe & Fishing Intel

Winnewana Impoundment is a small, quiet impoundment in Washtenaw County tucked within the Waterloo State Recreation Area — Michigan's largest state park at over 20,000 acres. The lake has a single boat launch with a basic ramp suited for small boats, canoes, and kayaks rather than anything with serious horsepower. Surrounded by the rolling hills and wetlands of the Waterloo area, it's the kind of spot where you're more likely to see herons and turtles than jet skis.

The Waterloo Recreation Area offers a dense cluster of nearby lakes and campgrounds — Green Lake, Sugarloaf Lake, Mill Lake, and the equestrian campground are all within a short drive. Winnewana is a good pick for paddlers or anglers looking for a low-pressure alternative to the busier lakes in the chain. Access requires a Recreation Passport, standard for state-managed launches in Michigan.

Sources: Wikipedia, Google Reviews, DNR data, campground & beach reviews, ShorelineScout enrichment