Ōtaki-Ōkawa Prefectural Natural Park (大滝大川県立自然公園, Ōtaki-Ōkawa kenritsu shizen kōen) is a Prefectural Natural Park on the southern border of Kagawa Prefecture, Japan.

Established in 1992, the park comprises two non-contiguous areas of the Sanuki Mountains.

[1][2] It includes Mount Ōtaki (大滝山) (946 m) and Mount Ōkawa (大川山) (1043 m).

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