Mount Monadnock Shirtless Summit

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Registration opens December 20

Embark on a unique, unforgettable journey with us to the majestic heights of Mount Monadnock. Our Fro-Zen cold weather shirtless mountain summit will provide you with the tools to unlock and explore your inner strength and power. Our experienced guides will be on hand to teach you all about cold acclimation, polar plunging and winter hiking. Join us for this one-of-a-kind experience! Together, we’ll rediscover the power of nature and unlock your true superpowers. This is an adventure that you will never forget.


Winter boots, micro-spikes, gloves, a stocking hat and your favorite bathing suit, shorts or sweatpants.


February 19, 2023: 9 to 10 am.  Cold acclimation intensive at the Sheepfold in Stoneham MA. Learn basic skills, the science of cold acclimation and take a group no shiver walk in a t-shirt. 1

February 26: 9 to 10 am: Ocean plunge at M Street Beach in South Boston

March 4th:  1 – 4 pm. Mountaineering skills and training in the Middlesex Fells.  Learn the basic skills necessary to safely travel on snow and ice, and practice your skills before the big climb.

March 5: 11 to 5pm. Mountain summit.   11 AM departure from the parking lot at Mount Monadnock in Jaffrey NH.  Roundtrip hike to the summit and back will take around four hours.

Pricing: $495 (does not include transportation, micro-spikes, winter gear or parking passes. See below).

*Graduates of our previous Fro-Zen program are eligible for $100 off.

This course includes:  

Professional cold acclimation guidance
Suggested protocols to prepare for the summit
Guided cold plunges, hikes and the mountain summit

This course does NOT include:

Transportation to and from Mount Monadnock

Parking at Mount Monadnock.  Carpooling encouraged. We’ll be departing from the Mount Monadnock Park Headquarters which is located at 116 Poole Road in Jaffrey NH. This $15 permit must be purchased at the following link:

Mount Monadnock Parking

Micro-spikes and trekking poles:  These are required and can be purchased separately on Amazon or rented for approximately $32 at the following links.

Winter hiking boots, coats, gloves and hats.

Minimum physical abilities:

This expedition is strenuous. To make sure that you’re prepared, you should be able to:
Either comfortably run a mile or hike at a fast pace for five miles.
Complete a 10-minute ice-plunge or cold shower 
Take part in all of activities on our mountaineering skills training day without a coat.

*Participants who are unable to meet the physical demands of this hike are encouraged to sign up for our local Fro-Zen Intensive.  Students who cannot complete the ten-minute cold shower or the mountaineering skills without a coat will be allowed to attend, but only if they wear protective winter wear.

**Due to the strenuous nature of this challenge, this course is not open to those with heart conditions of any type, injuries that would interfere with hiking and pregnant people.  

***Safety is our utmost priority.  If summit temperatures drop to below zero, or wind speeds are too high, we will end our hike at the tree-line just below the summit, or schedule a makeup day for Sunday March 12.  In the case of severe weather on both days, our final hike may take place in the Middlesex Fells.

See the video from last year’s summit!

To register for this event email your details to

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Date And Time

2023-03-05 to
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