Sugar Loaf is a bluff on the Mississippi River topped by a rock pinnacle, overlooking the city of Winona, Minnesota, United States. The name "Sugar Loaf" is sometimes taken to mean just the rock pinnacle, which was created by quarrying in the 19th century. The bluff stands above the junction of U.S. Route 61 and State Highway 43. It towers 500 feet (150 m) over Lake Winona (a former part of the Mississippi River's main channel), and the pinnacle rises more than 85 feet (26 m) above the remainder of the bluff.