The Indianhead Flowage is a 413-acre impoundment on the St. Croix River located in Polk County, Wisconsin. This lake-like section stretches for approximately 10 miles between Nevers Dam Landing and Highway 8, created by the hydroelectric dam at St. Croix Falls. The flowage reaches a maximum depth of 57 feet, with an average depth of 11 feet.

Due to its depth and lack of current, the flowage is commonly used by houseboats, fishing boats, and pontoons. The bottom composition consists of 40% sand, 30% muck, 20% gravel, and 10% rock. There is one public boat launch providing access to the water.

Paddlers should be aware of two aquatic invasive species present in the flowage: Eurasian Water-Milfoil and Yellow Iris. The wider, deeper nature of this section makes it distinctly different from the more riverine portions of the St. Croix River both upstream and downstream. Above the flowage, paddlers encounter riffles and sandbars, while below the dam requires a 1.3-mile portage through Taylors Falls to continue downstream.

The flowage is part of the St. Croix National Scenic Riverway, established in 1968 to preserve the river's natural character. Park rangers are available at the St. Croix River Visitor Center (at river mile S53.8) to provide trip planning information.

Fish species present include panfish, largemouth bass, smallmouth bass, northern pike, and walleye. The nearest communities are Taylors Falls, Minnesota, and St. Croix Falls, Wisconsin. Four state parks are located in the vicinity: Interstate State Park (both Wisconsin and Minnesota sides), Wild River State Park, and William O'Brien State Park.

For paddlers planning extended trips, it's important to note that camping regulations change at Highway 8, with permits required for camping south of this point. The flowage section itself serves as a transition zone between the more wild upper river and the developed lower river sections.