Jay Cooke State Park is a state park of Minnesota, United States, protecting the lower reaches of the St. Louis River. The park is located about 10 miles (16 km) southwest of Duluth, just outside the small town of Carlton. The western half of the park contains part of a rocky, 13-mile (21 km) gorge. This was a major barrier to Native Americans and early Europeans traveling by canoe, which they bypassed with the challenging Grand Portage of the St. Louis River.