Mammoth Mountain, CA Conditions Report: Closing Day 2016/17 = Day 270! Mammoth just had an absolutely incredible season. Yesterday was their 270th day of operations and their last of the season. Mammoth had the deepest snowpack in North America (most like on Earth) at over 300″ this season. Oh, how were the conditions? ย They were hot, slushy, corny, funny, and fun. ย Incredible to be skiing and riding on August 6th from […] Conditions Report SnowBrains | August 7, 2017 1 Comment