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How polluted is Crater Lake?

Crater Lake is not only the deepest lake in the country (nearly 1,950 feet), but it is also one of the cleanest. The Crater Lake Institute reports, “It's not pure water, but it's close…with no sediments, algae, pesticides, or pollution.”



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Fishing is not allowed within 200 feet of the boat docks. and is not advised where people are swimming. During the summer when public boat tours are operating, fishing is permitted around the lake shore and from the docks and shore of Wizard Island.

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Blue Lake, New Zealand Located in Nelson Lakes National Parks, Blue Lake is the clearest lake in the world. The lake is also known as Rotomairewhenua.

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If you want to explore further, follow the crowds across the road and to the top of the trail. From there, you can descend 700 feet in just over a mile to the shores of Crater Lake—the only place in the park you can legally and safely get down to touch the water.

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The park has more than 90 miles of hiking trails, but in May and June they are typically covered by deep snow. When snow-covered, most trails are either too difficult to follow, or too dangerous.

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However, between 1888 and 1941 the lake was stocked with seven different species of fish, only two of those species thrive today. It is currently estimated that the lake supports approximately 60,000 kokanee salmon (Oncorhynchus nerka; landlocked sockeye salmon) and rainbow trout.

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Lake Annecy originates from around 18,000 years ago, as a result of the melting of glaciers in the Alps. Today, it is considered the second largest lake in France and it has the title of the cleanest lake in Europe, due to strict environmental regulations introduced around 1960.

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In 1929, Lee Fourrier became the first person to swim across Crater Lake, but her swim was only one way. More recently, serious swimmers ride out to Wizard Island on one of the tour boats and swim to the dock, as the boat dock is the only legal access to the water from the rim. , and kept going.

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Lodging and Camping The lodge is typically open mid-May through early-October and is managed by Crater Lake Hospitality. Learn how to reserve a room. The Cabins at Mazama Village are typically open mid-May to late September, & are managed by Crater Lake Hospitality.

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