On a Spirit River Nature Area interpretive sign there are the words:

The Rum River was the super highway for the Isanti Indians. To them, this important waterway was known as Wakpa Wakan, the Great Spirit River, until a white man's pun turned "spirit" into "rum".

The SPIRIT RIVER NATURE AREA is a two mile long natural area located along side the currently named "Rum" River in Cambridge, Minnesota.

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