Mammoth Early Season Update & Photo Tour Mammoth mountain opened for the 2014-15 season on Nov 13th. At the time of this report, the snow conditions were hard packed and mainly a 14-18″ base of man made snow with some minimal bare spots on the main runs. Overnight temperatures were cool enough for snow making, so the snow guns were hard at work through the night. […] Conditions Report Guest Author | November 24, 2014 0 Comments