Castle Dome was a small mining settlement which first produced silver and later lead. Since lead is not nearly as valuable as silver, the mine did not last very long. The post office opened in 1875 and closed in 1876. Tyler and I were at Castle Dome well after dark. I would not advise this as you can see the mine shafts are uncovered and very very deep. We are planning a day trip to this mining area when the weather cools off.