Sweet Briar Lake is a 278-acre North Dakota designated scenic area located in Morton County, approximately 18 miles west of Mandan off I-94 Exit 134. This relatively shallow lake features an average depth of 10 feet with a maximum depth of 30 feet and 10.5 miles of shoreline. Fed by Sweet Briar Creek, the lake has gained attention both as a popular fishing destination close to the Bismarck-Mandan metropolitan area and as the subject of an ongoing fisheries management study. The North Dakota Game and Fish Department has been conducting a collaborative two-year study with the University of North Dakota since 2023, introducing approximately 4,000 channel catfish (averaging 2 pounds each) to help control an overabundant black bullhead population that was negatively impacting the lake's angling quality.