CASTAIC >> Pyramid Lake was again open to swimming Tuesday, but state water officials warned visitors that the toxic algae that forced a swimming ban last week is still present in parts of the lake.

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This striking satellite photo shows an exceptionally dense and toxic algal bloom swirling in the waters of Nevada's Pyramid Lake. Some experts believe that the algae has existed in the lake for at ...

A lake in Nevada has turned a light shade of blue since the start of the month after a toxic algae bloom that's kept area residents out fo the water. Pyramid Lake is located in a remote desert area of ...