After a few miles of VERY tight, bumpy, twisty 4-wheeler trail, we came out onto the end of what Google Earth calls Campbell Rd, but the locals couldn't confirm or deny that. Anyway, the entrance to Blowing Cave is just up the hill to the L (of the pic; R as I'm driving).

The people on 4-wheelers behind me (note their headlights) told me I wouldn't be able to drive this trail, or get past these blocks, but I had no trouble.

Owner caption September 2011 · Photo 3875 of 5000