Lcoated in northern Marinette County, the upper portion of the Peshtigo flows through the beautiful Chequamegon-Nicolet National Forest and has some of the most difficult whitewater in the midwest. The river above Caldron Falls Reservoir, has long and difficult rapids that require a high degree of canoeing skill. Water levels should be medium high or above. Below Crivitz, the river slows and widens in sharp contrast. Reservoirs on the central river offer lake canoeing.