Black Hills Rockhound Road runs from Highway 191 to the Black Hills Backcountry Byway. It provides access to an area known for fire agates. Fire agate is a relatively new gemstone, only identified and formally recognized in the 1930s. It has the color play of precious opal with gem-quality reds, greens, and blues. Fire agates are only found in the desert regions of Arizona, southern California, and central Mexico and are always associated with volcanic deposits. The rockhound area is open for digging and does not require a permit.
The southern half of the road is easy enough for medium-sized RVs but gets narrower and rougher as it drops into Yellowstone Canyon before climbing out of the broad valley. The trail briefly passes through the Double C Ranch. Be sure to close the gate.
Approximately ten rocky campsites of varying sizes line the middle section of the trail. Most have rock fire rings. Several are large enough for mid-sized RVs. Camping is allowed for up to two weeks.