Description: Sullys Hill is located on the south shore of Devils Lake in Benson County, in the heart of the Spirit Lake Nation. The preserve consists of 1,674 acres ranging from wetland marshes to wooded hills and is home to a myriad of migratory birds and big game. Sullys Hill was named for General Alfred Sully, who was scheduled to meet up with a cavalry from Illinois, but never showed up. The cavalry camped on the highest hill in the area in anticipation of General Sully's arrival. When he failed to meet them, the cavalry named the hill in honor of Sully.