It accounted for 99% of the total Copper and Silver production from the mountains, which totaled 12.5 million pounds ( over 6,250 tons ) of Copper and 3,500 ounces of Silver ( as a by product of the Copper mining ).[8] Many of the mines located higher up in the mountains helped develop some of the modern day hiking trails, one notable example being Sixshooter Canyon trail in the eastern section of the mountains. Which was a mining trail leading to a mine claim in the mid to late 1870s,[9] the miners each wore Six shooters which led to the naming of the Canyon and the trail, in what was then the American frontier in Arizona. Today, however, there are no active mines on the mountains and most of the previous mines have long been mined out.