Isa Lake Photos

Meet 2 travelers, 5 tour guides and discover 974 photos

Isa Lake is believed to be the only lake in the World which drains to two different oceans backwards. The east side of the lake drains by way of the Lewis River to the Pacific Ocean and the west side of the lake drains by way of the Firehole River to the Atlantic Ocean. This is the opposite of what one would expect since the Atlantic Ocean is…
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Isa Lake - Yellowstone - USA