Narrow Gauge near Mayer, AZ?

Hi folks, I need a bit of help. A few years ago I was doing some work near Mayer, Arizona, and learned that I was walking on an old railroad grade that extended west a mile or two from the old smelter site near Mayer, Arizona on the west side of Big Bug Creek. I seem to recall finding a tiny bit of information about this railroad, and believe it was narrow gauge. It shows up on an old topographic map from 1903, but I can no longer remember the name of the railroad, and can no longer find the information. I think it went to the Hackberry Mine, but maybe it went up Grapevine Creek.

Any help regarding this railroad would be appreciated.

Kevin