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Mud Lake, an expansion of the Neenah or Fox river in town thirteen range nine five miles below the portages. About [half] a mile in length.

Mud Lake, a small lake in the eastern part of Jefferson county, near Cranberry Lake.

Muddy Lake- a small lake forming the source of the Yellow river, a branch of the St. Croix.

Muddy Lake-one of the small lakes forming the source of the Leaf or St. Francis river.

Muddy Creek, a small tributary of the Mississippi, separated by a portage of only one mile in length from Mille Lac.

Mullet river a branch of the Sheboygan river, named in honor of Mr. Mullet a surveyor.