That would depend on the type of mine Golden. A surface mine can have its hazards with sudden drops, loose rocks etc. but a "Tunnel" mine is a death trap. Many tunnel mines were abandoned not because they played out, but other reasons like Ground water, gas, cave ins etc.
I know it's very tempting to go in and check them out, but doing so is like playing Russian Roulette. Sooner or later you're going to loose! No amount of gold is going to be worth your life. There are old miners and foolish ones. You just won't find any old foolish ones.