Spencer Weiner / LAT
A folksy sign welcomes visitors to Mammoth Lakes Pack Outfit, purveyor of horseback rides and pack trips into the Eastern Sierra. The outfit, one of the oldest in the state, is located on the site of Mammoth City, an 1870s mining camp near the shores of Lake Mary. The mining camp is long gone, replaced by horse and mule stables, a few miles outside the ski resort town of Mammoth Lakes.
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