This peak is #1 on the Height List for South Dakota . This peak is #1 in Prominence List for South Dakota .The highest mountain in South Dakota which is located in the Black Hills National Forest. An abandoned fire lookout tower is situated on the summit. A plaque at the base of the tower which reads "Valentine McGillycuddy, Wasicu Wacan" marks the final resting place for Dr. Valentine McGillycuddy.
Name Notes: Named in the late 1850s by Lieutenant Governor K. Warren in honor of General William S. Harney, who was commander of the military in the Black Hills area in the late 1850s.