Why is Crater Lake so blue?
Posted on Oct 20, 2025 / Travel
Crater Lake’s color comes from its insane purity — it’s literally one of the clearest bodies of water on Earth. There are no streams bringing in sediment, so sunlight penetrates deep and scatters blue light back to your eyes. The lake’s clarity can reach over 100 feet down, which makes it glow an unreal shade of sapphire on sunny days. Locals say the blue changes mood with the weather — deep navy when it’s cloudy, electric turquoise when the sky’s clear. It’s like the lake has its own personality. You really have to see it in person to believe it.
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