Devan Odille

Mammoth Mountain Opening Date 2025. Celebrate mammoth mountain’s 24/25 winter opening day with the kickoff party of the season! Click here for mammoth lift tickets.

Mammoth mountain, one of california’s crown jewel ski resorts, has just confirmed to powder that they will open on friday, november 15 for the winter ’24/’25 season. Check out nearby june mountain, too.