What kind of recreational things do they have at Rapid City SD minimum unit? Can they take walks?

Yes, the minimum security inmates have room to move around. There is a track and weight equipment. There are also many organized sports events and recreational activities to keep them busy.

The low security means that the inmates are less likely to leave as they have short sentences and are close to the door. If they screw up, good time is taken away and they probably will do the balance of their time in a much more strict environment.