2024 – Micro CRYO

presented by

Brave the lake in winter

The Micro-CRYO is the ideal introduction before tackling the SUNNY Traverse in the future. In this event, athletes face the challenge of running in winter, in the dark, on the magnificent Lac St-Jean. Under a starlit sky, hearing only the sound of their footsteps in the snow, participants will enjoy a truly exotic experience.

The Micro-CRYO will start at the Village sur glace in Roberval and finish at Chalets et Spa Lac Saint-Jean in Chambord under the cover of darkness. Athletes will use the same groomed and marked track as Traversées athletes.

Participants have a maximum of 2 hours to complete the Micro-CRYO. No selection criteria are required. However, running on a frozen lake in the middle of winter and at dusk represents a major challenge that really shouldn’t be overlooked, and is nothing like a trail or road race in terms of the effort required and the mental strength required. Weather conditions can deteriorate rapidly in the early evening, providing an extra challenge for athletes.

Each participant is commited to raising $750 in donations for the On the Tip of the Toes Foundation, which changes the lives of young cancer patients by offering them the chance to take part in a therapeutic adventure expedition. Please note that fundraising is mandatory. Only participants who have completed 100% of their fundraising will be able to set off on February 24.

In all, a maximum of 100 people will have the chance to take up this challenge next February.

Are you ready to brave the night, the cold, the lake?

To participate

Participants must pay a registration fee of $75 in addition to raising a minimum of $750 in donations.

Tax receipts may be issued for donations of $20 or more.

Please note that fundraising is mandatory. Only participants who have completed 100% of their fundraising will be allowed to take the start on February 24.



5:15 p.m. Departure of the shuttle bus (provided for all athletes from Chambord finish to Roberval race start).

5:45 p.m. Athletes’ meeting at starting site.

18:00 p.m. Departure of the MICRO-CRYO.


In addition to the clothing you will wear at the start of your race, here is the list of mandatory equipment you must have with you throughout your race.

  • Running shoes suitable for cold weather (trail or winter shoes) No road or street running shoes will be accepted.
  • Clothing adapted to the temperature (multi-layer systems preferred), as colorful as possible to increase visibility:
    • Lined insulating coat (ideally synthetic) if not already worn;
    • Windproof coat if not already worn;
    • Spare gloves or mittens;
    • Spare neck warmer or tubular scarf;
    • Spare tUque;
    • Spare socks.
  • Cell phone with fully charged battery (plan to keep it as warm as possible with hand warmers);
  • Survival blanket;
  • Foot and hand warmers;
  • Eye protection (ski goggles) ;
  •  Whistle;
  • Clothing with reflective stripes;
  •  Backpack;
  • Necessary medication (asthma, EpiPen, etc.);
  • Health insurance card;
  • Reusable glass (to reduce waste, no glass is available at the refuelling stations. You are responsible for bringing your own bottles, glasses or any other container of your choice).
  • Headlamp with at least 100 lumens maximum charge (bring spare batteries or a second lamp);
  • 2 lights (bike light style) set to flashing mode (one on the bag + one on the front).



  • Gaiters ;
  • Insulated liquid container ;
  • Snowshoes (depending on trail conditions) – (It is possible to leave a pair of snowshoes in the drop bag for Traversée athletes);
  • Crampons (depending on trail conditions);
  • Energy supplements.



“Honestly, this race is special. There’s no other race like it.
You finish it and say to yourself: OK, that’s enough, I’ve done it!
But you still come back, attracted by the unique experience that the Lac provides.
The organization is truly extraordinary. Despite the great challenge, we feel safe at all times.”

Pier-Charles Boily, participant in the Micro-CRYO (13km) in 2023