Toughest, Coldest & Windiest 

Experience one of the most beautiful and extreme environments on the planet

Race to the top of the World

The 6633 Arctic Ultra: Yukon Edition isn't just a race, it is an adventure and an expedition ending when you reach the Arctic Circle and experience some of the most extreme and most beautiful landscapes on the planet. 

Passing through the Tombstone National Park and taking in the sites of the Ogilvie Mountains, this is not a race to be taken lightly. The full distance covers over 12,000 feet of elevation through all the weather conditions the Arctic can throw at you. You have biting cold, sometimes lower than -50 degrees celsius, big elevation and a big distance to cover. You are, however, rewarded with breathtaking sites and amazing views in a one of the worlds most magical places. You may even be treated to some of the Yukon's stunning wildlife.

The race is a 250 mile non-stop, self supported race with the option to finish at 120 mile mark as a finisher of the 120 distance. Participants will be tested to their limited on this route, physically and mentally. Make no mistake, rolling hills with endless ups and Arctic weather conditions make this one of the toughest races you can be part of.

Entries OPEN for the 2024 Edition

24th February 2024
Dawson, Yukon 

6633 Arctic Ultra

February 2025
Eagle Plains, Yukon 

The Classic 6633 Arctic Ultra isn't just a race, it is an adventure and an expedition ending on the Arctic Ocean and experiencing some of the most extreme and most beautiful landscapes on the planet. 

Regarded by many as the toughest, coldest, windiest footrace on the planet, the 6633 will take you through the frozen landscape of the Canadian Arctic, through First Nation Hamlets meeting some of the friendliest and most generous people you could ever wish to meet. You will make friends for life on the race and return with a much deeper and more powerful understanding of you and what makes you tick.

The non-stop self-sufficient foot race is over a distance of either 120 miles or 380 miles, with both races crossing the line of the Arctic Circle.

The 120 mile race finishes at the First Nations Hamlet of Fort McPherson, whilst the longer 380 mile race continues to the banks of the Arctic Ocean at Tuktoyaktuk.
Entries OPEN for the 2025 Edition

 120, 250 or 380 Miles through the frozen Canadian Arctic with temperatures as low as -40 degrees celcius ...

Interested?

What is the 6633 all about?


Martin is the creator of the original 6633 and Race Director of this extreme event since its conception in 2007. Since that time Martin has spent over a year (18 trips) in the Yukon and Northwest Territories on matters relating to this Ultra, and is well known and respected throughout the region as the mad Welshman who brought this event to the Arctic. 

The 6633 Arctic Ultra is based on Martins preferred type of event comprising a non stop, self supporting, no fuss, full on adventure that sees the entrants push themselves way beyond what they believed possible.

About the 6633

Places for 2024 are limited

 The  Yukon Edition 2024

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by 6633 Arctic Ultra Team 09 Sept, 2022
2022, What a year!!!
by 6633 Team 01 Apr, 2021
That's a Wrap! The first Virtual Series is complete!
by 6633 Team 09 Mar, 2021
What on earth were you thinking!!
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