Silica Mines
This mine is about 17 miles west of Hill City on Ditchcreek Rd. It is southwest of Deerfield Lake about 3 miles from the pavement. Once on Ditchcreek Rd you turn onto Peggy Dr and immediately park the car once you go over the bridge. The picture below shows where to pull in and park. From there you climb the road to the left up the hill a bit and it opens to the mines. The mines are pretty cool and you need a flashlight to enter. Look at google maps below to see where the mines are.