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Lonesome Lake

Wyoming’s Crowded Lonesome Lake Tops EPA’s National Survey for Fecal Contamination

Environmental regulators have launched an investigation into a heavily trafficked lake below the Cirque of the Towers in the Wind River Range, with an enterococci reading 384 times the safety threshold.

By Mike Koshmrl, WyoFile

The south and west reaches of Lonesome Lake are visibly shallow in this July 2025 photo taken while descending from Jackass Pass. Long reputed to have quality issues related to human waste, the Shoshone National Forest lake is being examined for an E. coli impairment after regulators initially detected fecal bacteria levels several hundred times more than is believed to be safe. Credit: Mike Koshmrl/WyoFile

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