Traveled to western South Dakota for a business meeting, so I decided to get a hike in. Started at the trailhead at Sylvan lake at 6:45 -- no other cars there. Much of the hike is through wooded areas, but there are plenty of nice views of interesting rock formations in the Black Hills. About a third of the way to the summit is a bench along a ridge which offers a view of the lookout tower on Harney Peak in the distance -- very cool view. The hike isn't that strenuous but there are plenty of stairs to get to the top of the lookout tower. The views from the tower are very nice. I had the trail to myself the entire way up, but passed a number of hikers on the way down.
I did notice a lot of fallen trees in the Black Hills, due to the mountain pine beetle. Kind of sad, but I guess that's nature running its course.
I definitely recommend this hike if you find yourself in the Black Hills.