Mammoth Opening Day 2025. An icon of a paper envelope. Pack your gear and head to mammoth lakes on november 10, 2023 for mammoth mountain opening day and enjoy festivities on and off the mountain all weekend long.
Mammoth mountain, california announced today, august 7, 2024, that they are just 100 days out from their projected opening day for the winter ’24/’25 ski season. Below is a list of the open and closing dates we currently have.