Oregon Draining Lake

Oregon Draining Lake

This mysterious Oregon lake is named “Lost Lake”, and once a year, it actually gets lost: it drains itself down a hole every year. The cause of this extremely rare phenomenon is a geological feature called a lava tube. A lava tube is a natural conduit formed by flowing lava which moves beneath the hardened surface of a lava flow. Tubes can be actively draining lava from a volcano during an eruption, or can be extinct, meaning the lava flow has ceased and the rock has cooled and left a long, cave-like channel.

But why the lake gets lost only once in a year? Because in the early spring, the water from the melting snow on top of the Cascade Range fills the lake faster than the hole can drain it. After most of the snow melts, the hole overcomes and the lake empties itself.

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