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The Tippecanoe Watershed drains about 1.25 million acres in north central Indiana. The watershed is centered around the Tippecanoe River, which flows from its source at Crooked Lake (which lies in both Noble County and Whitley County) to its confluence with the Wabash River near Battle Ground in Tippecanoe County. The Tippecanoe Watershed drains nearly all of Fulton County, Pulaski County, and White County, a large part of Kosciusko County, and smaller portions of ten other counties. The Tippecanoe River is more biologically diverse than most rivers in the upper midwest, and is particularly notable for the number of freshwater mussel species that live in it.
Notable tributaries of the Tippecanoe River include Grassy Creek, Walnut Creek, Timber Creek, Yellow Creek, Chippewanuck Creek, Mill Creek, Mud Creek, Big Monon Creek, and Moots Creek. After joining the Wabash, waters from the Tippecanoe River make their way to the Ohio River and thence into the Mississippi River and on to the Gulf of Mexico.