Awesome area to ride with a ton of places to ride!! Several areas are marked and some are not. We actually head that way at least once a year and sometimes twice a year to ride.
Here's just few places that come to mind,
Camp 5 and the China Wall - Cool place with creeks and some really rocky trails
Nemo - Head up to the flag for an awesome view.
Nemo Cemetery - Just outside of town and its an old cemetery.
Custer Peak - It's a fire watch tower that is still in use and offers one of the greatest views in the hills!!
Rochford - The bar is a great place to stop and check out.
Flag Mountain - Another peak that is really cool
Cement Ridge Lookout - Fire watch tower with great views
Tinton the ghost town - Very close to Cement Ridge, its fenced off but you can see some of the buildings
Galena the ghost town - Its over by Camp 5 and has several buildings that have been restored, so not a true ghost town....???
Horse Thief Cave - is also in the Camp 5 area but its off of an official Rock Crawler trail. I've never been there but it looks cool in that area.
Power lines - not on the map but you can run several routes as long as you avoid the private land. If you have Avenza maps it makes it easier.
Silica Sands Mine - Awesome place, off of trail 6021, which is just south of Deerfield Lake.
Hill City - Great little town with good places to eat and a few wineries that offer wine tasting for the ladies......
Like I said, it's an awesome place to ride with tons of areas to go. If you have Avenza maps there are three different maps for Black Hills. One for the northern hills, one for the central hills and one for the southern hills. Down load them all and you are set.
Also check out,
Black Hills ATV Destinations ? Visit our South Dakota Black Hills hidden treasures. (ATV Trails, UTV Trails, Caves, Old Buildings, Ghost Towns)
Tons of more information are on this site!!
Good luck and have fun!!