Ronchaux (French pronunciation: [ʁɔ̃ʃo]) is a commune in the Doubs department in the Bourgogne-Franche-Comté region in eastern France.

Ronchaux lies 6 km (3.7 mi) from Quingey on the banks of the Bief de Caille, a stream that issues from the Mittonière cave.

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