Oregon is known for its breathtaking lakes and peaceful waters—perfect spots for fishing, swimming, or simply relaxing. But some of these scenic lakes harbor a surprising and somewhat unsettling secret: they’re teeming with snakes.
From sunbathing on rocks to swimming near the shore, these slithery residents thrive in certain lake environments across the state. Whether you’re an outdoor enthusiast or just planning a day by the water, knowing which lakes have high snake populations might change how you see Oregon’s natural beauty.
Here’s a closer look at the most snake-infested lakes you’ll want to be aware of.
Why Are Snakes Drawn to These Lakes?
Snakes, like many other creatures, are attracted to habitats that offer food, shelter, and warmth. Lakes with dense vegetation, abundant fish, frogs, and other small prey are ideal. Some lakes have just the right combination of shoreline cover, sun-warmed rocks, and ecosystems rich in amphibians and rodents, making them snake paradises.
Water snakes, garter snakes, and other nonvenomous species are especially common in Oregon’s warmer, lower-elevation regions. While these snakes typically pose no danger to humans, the sheer number of them in certain places can be unnerving.
The 5 Most Snake-Infested Lakes in Oregon
Here are some of the most snake-populated lakes in the state — places where visitors have reported frequent sightings or unexpected encounters.
1. Fern Ridge Reservoir – Lane County
Located just west of Eugene, Fern Ridge Reservoir is known for birdwatching, boating, and, surprisingly, snakes. The marshy edges of the lake are perfect hunting grounds for garter snakes. Locals often report seeing them slither through the grass or even swim in shallow waters. During warmer months, the population is especially active.
2. Upper Klamath Lake – Klamath County
As Oregon’s largest freshwater lake, Upper Klamath is home to a wide variety of wildlife — including plenty of reptiles. Its vast marshlands, reed-choked shorelines, and murky shallows create prime real estate for snakes. Garter snakes are common here, and visitors occasionally spot them sunbathing on rocks or swimming across narrow inlets.
3. Agency Lake – Klamath County
Just north of Upper Klamath Lake, Agency Lake is another hotbed for snake activity. Its extensive wetlands are ideal for amphibians, which means it’s also a feeding ground for snakes. This lake is quieter and less trafficked, making it an undisturbed haven for wildlife of all kinds, including Oregon’s many slithering residents.
4. Lake Abert – Lake County
While not ideal for recreational swimming due to its high salinity, Lake Abert has earned a reputation for being home to numerous reptiles, including snakes. The dry, rocky terrain surrounding the lake offers warm basking spots and plenty of rodent prey. Hikers and birdwatchers have frequently reported run-ins with snakes along the shoreline.
5. Hart Lake – Warner Valley
Remote and rugged, Hart Lake is tucked away in southeastern Oregon. This area is more desert than forest, and the dry environment supports several snake species. While the lake itself is stunning, especially at sunset, it’s not unusual to come across garter snakes weaving through shoreline brush or basking near the water.
Are These Snakes Dangerous?
The good news? Most of the snakes spotted at these lakes are harmless. Garter snakes — Oregon’s most common type — are not venomous and tend to avoid humans. That said, their presence in large numbers can still be intimidating, especially when you see one swimming right by your kayak.
Oregon does have one venomous snake species — the Western Rattlesnake — but it’s typically found in drier, rocky areas far from lakes and wetlands.
Still, if you’re squeamish or have a fear of snakes, these lakes might not be your ideal picnic destination.
What Should You Do If You Encounter a Snake?
If you’re hiking, fishing, or paddling near any of these lakes and spot a snake, stay calm. Here are some quick tips:
- Don’t approach or try to touch it.
- Give it space — most snakes will slither away if not cornered.
- Watch your step in grassy or rocky areas, especially near the water’s edge.
- Wear boots if you’re hiking in snake-prone areas.
Should You Still Visit These Lakes?
Absolutely — if you’re aware and respectful of nature. These lakes are stunning and offer everything from boating to birdwatching. Just remember: you’re sharing the space with wildlife.
Think of it as part of the experience — a chance to witness Oregon’s rich biodiversity up close.
Final Thoughts
Oregon’s wild beauty comes with surprises, and a snake-infested lake is one of them. Whether you find it thrilling or terrifying, these lakes remind us that nature is untamed and unpredictable. So the next time you dip your toes into Oregon waters, take a moment to scan the shore — you never know what might be watching you back.