Interesting. There’s a tunnel by the 2 off Mt Wilson that I used to ride through but not a mine. I know a guy who used to explore abandoned mines in the area so I’m not surprised.hey if you go up 2 to near mt San Antonio if I remember correctly there is a gate for when they close the road. downhill from that is an old abandoned mine that we spent hours hiking though the old shafts. bring string and chalk so you can find your way out