The Namekagon Visitor Center is operated by the National Park Service. The center features new exhibits including a life size replica sturgeon, interactive and hands on exhibits, and a diorama featuring animals along the Namekagon. A park ranger is available to answer any questions you may have regarding the Namekagon River. The Namekagon River (pronounced NAM-uh-Kah-gun) is a 95 mile long river which is a tributary to the St. Croix River. The Namekagon is protected under the St. Croix National Scenic Riverway.