2025 Mammoth Winter Marathon

The Mammoth Winter Marathon is a long standing tradition at Tamarack -- this year marks the 46th running of the event.

The Mammoth Winter Marathon offers a choice of races:  Marathon, Half Marathon, 10K , and a Junior 3K.

A t-shirt, raffle ticket, and lunch are included in the entry fee. Join us for the Awards Lunch at 1:30 pm at the Mammoth High School .  

Note that the races start at 9:00 AM. The race will start at the Pack Station, so be sure to allow adequate time to ski up there.

This race is a fundraiser for ESNSA in support of our Junior Nordic Racing program -- thank you for your support!