Wisconsin is home to over 20 snake species, including the venomous eastern massasauga and timber rattlesnake. Before swimming, boating, or fishing, visitors should be aware of the lakes where snakes are most commonly found. Here are the top snake-filled lakes to keep in mind for a safe trip.
1. Lake Pepin
Lake Pepin, a natural lake along the Mississippi River between Wisconsin and Minnesota, is famous for water activities and the legend of “Pepie,” a mythical lake creature. While Pepie is just folklore, real snakes do inhabit the lake. You’ll find species like the common garter snake and the non-venomous watersnake, known for their black and yellow stripes. Luckily, none of the snakes in this lake are poisonous.
2. Devil’s Lake
Located in the Baraboo Range, Devil’s Lake is one of Wisconsin’s most snake-populated areas due to its rich wildlife. It’s home to several species, including the timber rattlesnake, red-bellied snake, black rat snake, and northern watersnake. The timber rattlesnake is the only venomous one here, growing up to 60 inches (152 cm) with dark crossbands on a light brown body. Though shy, it can swim well and has potent venom that may cause pain, bleeding, and muscle spasms.
3. Lake Winnebago
This large freshwater lake in east-central Wisconsin attracts many animals, including snakes. The eastern garter snake is commonly found here. Though small—growing up to 26 inches (66 cm)—it has a special gland that can cause mild irritation in humans. However, it is not venomous.
4. Lake Michigan
Lake Michigan’s deep waters, islands, and coastal forests provide an ideal habitat for water snakes. The northern watersnake, known for its dark bands and yellow-to-black coloration, is a strong swimmer and can reach up to 4 feet 5 inches (135 cm) in length. Though its bite looks scary, it is harmless to humans. While rare, the venomous eastern massasauga rattlesnake can sometimes be found in nearby wetlands, so it’s wise to stay alert.
Before heading to these lakes, knowing which snakes you might encounter can help you stay safe and enjoy Wisconsin’s beautiful waters.
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