Opening and Closing Dates
Mammoth MountainOpen

The official opening and closing dates for Mammoth Mountain, California for current and past seasons. These dates are subject to change at Mammoth Mountain's discretion based on weather and snowfall. Estimated dates are based on historical averages or advice from the resort.

Mammoth Mountain, California
22/23Nov 05 2022Jul 30 2023 (estimated)
21/22Oct 29 2021Jun 05 2022
20/21Nov 13 2020May 31 2021
19/20Nov 09 2019Mar 14 2020 *
18/19Nov 10 2018Jul 07 2019
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