Collier's New Encyclopedia (1921)/Wisconsin River
WISCONSIN RIVER, the largest river in Wisconsin. It rises in Lake Vieux Desert, in the N. part of the State, and flows S. and W., emptying into the Mississippi 4 miles below Prairie du Chien. It is nearly 600 miles long and is navigable to Portage City. Remarkable rapids and falls, called “dalles,” occur at several places, the river passing through deep gorges between rocky bluffs, some of which are more than 400 feet high.