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Isa Lake in Yellowstone Park drains from continental divide to two oceans

Isa Lake atop Craig Pass on the continental divide in Yellowstone National Park drains to both the Atlantic and Pacific oceans. (NPS photo - click to enlarge)

Isa Lake, which actually is more pond than lake, sits within Craig Pass, and is famous because it drains to two different oceans, but does so "backwards," according to the National Park Service. "At one time, it was probably the only lake on Earth that drained naturally backwards to two oceans, the east side draining to the Pacific and the west side to the Atlantic," states the 2012 edition of Yellowstone Resources and Issues Handbook, a Park Service reference guide. Continue Reading →

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