Natural swimming hole
Menomonee Park, Lannon Quarry
Quarry · Wisconsin
About this swimming hole
Menomonee Park's Lannon Quarry is a 16-acre spring-fed lake with a sandy family beach inside a 464-acre county park. Trails wind through marsh, wetlands, and maple forest before opening onto the quarry, and a separate dog swim area keeps pups happy. The historic Lannon stone crusher ruins add an industrial-history backdrop.
Good to know
| Water type | Quarry |
|---|---|
| Water temperature | 70s in summer |
| Depth | quarry lake |
| Best season | June-August |
| Fees | Waukesha County park pass or daily fee |
| Reservations required | No |
| Parking | county park lots |
| Amenities | sandy beach, dog swim area, scuba diving, beach house |
| County | Waukesha County |
| Nearest town | Menomonee Falls |
| Safety notes | no lifeguard at beach; deep quarry water |
Map
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Frequently asked questions
Can you swim in Menomonee Park, Lannon Quarry?
Yes — Menomonee Park, Lannon Quarry is listed as a natural swimming spot in Wisconsin. Reported water temperature: 70s in summer. Heads-up: no lifeguard at beach; deep quarry water. There are rarely lifeguards at natural swimming holes — verify conditions locally before you go.
Does Menomonee Park, Lannon Quarry require reservations?
No reservations are required at Menomonee Park, Lannon Quarry based on current information — but verify before you go.
Is there a fee to visit Menomonee Park, Lannon Quarry?
Reported fee info: Waukesha County park pass or daily fee. Fees can change — confirm with the official link.
When is the best time to visit Menomonee Park, Lannon Quarry?
The best season is typically June-August.