Blauer Stein (lit. 'Blue Rock') is a mountain of volcanic origin in the Hegau region (Schwarzwald-Baar) of southern Baden-Württemberg, Germany.[1] It is located near the village of Randen (Blumberg).
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47°49′37″N 8°35′54″E / 47.82694°N 8.59833°E / 47.82694; 8.59833