6633 Arctic Ultra
Our original race: 120 or 380 miles up the Dempster Highway to the Arctic Ocean, non-stop and self-sufficient, pulling your own kit through cold that can drop to -50.
Explore the 663366 Adventure
Extraordinary races through extraordinary places
Expedition ultras from the Arctic Ocean to the South Pacific.
Our story
Born in the Arctic. Raised to explore the world.
It started in 2007 with one race and one road: 380 miles up the Dempster Highway from Eagle Plains to the Arctic Ocean, on foot, with everything you need dragged behind you on a pulk. Nearly twenty years on, the 6633 Arctic Ultra is still the race at the heart of everything we do, and it has taught us how to put on a race, and look after the people in it, in places most will never see.
66 Adventure is what we've built from that. The same crew now runs a staged race on the Arctic ice roads, a fat bike race across the frozen far north and a five-day crossing of Fiji, with the jungles of Belize coming next. They're very different places and very different formats, but they're run the same way: small fields, straight talking about how hard it is, and a crew that stays out of sight but is never far away.
2007
Our first race on the Dempster
4
Races on sale now
-50°C to 28°C
From the Arctic Ocean to the South Pacific
40
Places on the 6633 in 2028
Every finisher
Named on our Roll of Honour
Where we race
From the Arctic Ocean to the South Pacific
Three of our races share the same frozen country in Canada's far north, where the Dempster Highway runs out onto the ice roads of the Peel River and the Mackenzie Delta. The fourth crosses an island on the other side of the world. Tap a pin to see where each one goes.
The Arctic Circle · 66°33' North
Equator
Tropic of Cancer
Tropic of Capricorn
Yukon and Northwest Territories
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6633 Arctic Ultra24 February 2028Find out more
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Northern Lights Ultra28 February to 3 March 2029Find out more
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Fat Bike Weekend Warrior1 to 3 March 2029Find out more
Fiji
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Coast to Coast Fiji6 to 12 September 2027Find out more
Belize
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Rio Bravo Jungle UltraComing soonRegister interest
Northern Lights Ultra
180 miles in five stages on the private ice roads of the frozen Peel River, on foot or on skis, with a heated camp every night and, if the sky plays along, the aurora overhead.
Explore the Northern Lights Ultra
Fat Bike Weekend Warrior
Over 300 miles of Arctic in three days on a fat bike, riding the Dempster Highway and the river ice between Inuvik, Fort McPherson and Aklavik.
Explore the Weekend Warrior
Coast to Coast Fiji
Five days across Fiji's main island from the north coast to the South Pacific, through the interior the resorts never show you, camping in villages and finishing in the sea.
Explore Coast to Coast FijiRio Bravo Jungle Ultra
We're heading into the jungle next. Register your interest and you'll be the first to hear when dates are set.
Register interestFind your race
Which adventure are you taking on?
Pick the one that fits. They're all run by the same crew, and the only thing they really have in common is that you'll come home with a story nobody else at work has.
6633 Arctic Ultra
Eagle Plains to the Arctic Ocean
The original. Non-stop and self-sufficient, 120 or 380 miles, and only every three years.
24 February 2028 · £4,950Explore
Northern Lights Ultra
Chase the Arctic sky
Five stages on the frozen Peel River with a warm camp waiting at the end of every day.
28 February to 3 March 2029 · £3,000Explore
Fat Bike Weekend Warrior
Ride hard. Ride north.
Three days, over 300 miles, and the only one of our races on two wheels.
1 to 3 March 2029 · £3,000Explore
Coast to Coast Fiji
The toughest path through paradise
Five days across Fiji, village to village, finishing in the South Pacific.
6 to 12 September 2027 · £2,800Explore
| 6633 Arctic Ultra | Northern Lights Ultra | Fat Bike Weekend Warrior | Coast to Coast Fiji | |
|---|---|---|---|---|
| Where | Yukon and Northwest Territories, Canada | Northwest Territories, Canada | Northwest Territories, Canada | Viti Levu, Fiji |
| When | 24 February 2028 | 28 February to 3 March 2029 | 1 to 3 March 2029 | 6 to 12 September 2027 |
| Format | Non-stop, self-sufficient | Five stages, supported | Three stages, fat bike | Five stages, supported |
| Distance | 120 or 380 miles | 180 miles | Over 300 miles | 157 miles (252km) |
| You sleep | Where you stop, in your own kit | Heated camp every night | School halls along the route | In villages, in your own tent |
| Temperature | -5 to -50°C | Down to -44°C | -20°C and lower | 24 to 28°C |
| Entry | £4,950 | £3,000 | £3,000 | £2,800 |
Dates
What's coming up
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300days to go
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471days to go
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841days to go
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842days to go
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Dates to be announced
Roll of Honour
Every finisher has a name
Since the first race in 2007 we've published the name and time of every person who has finished the 6633, and we're straight with people about how few that is. Not many make it to the Arctic Ocean, and the ones who do are on our Roll of Honour for good.
Every year our crew also picks one athlete for the Like Award, named after our founders Martin and Sue Like. It isn't for the fastest. It's for the person who best captures the spirit they built the race on, and their name goes on a moose rack that stays in the Yukon forever.
The crew
Out of sight, never far away
We want you to feel out there on your own, because that's half of what you came for. The reality is that we're never far away. There's medical cover throughout, hot water and shelter at every checkpoint, live tracking so the people at home can follow every mile, and a crew who have been doing this in the far north since 2007.
Stuart ThornhillRace Director and co-owner
Jonny DaviesRace Director and co-owner
Get the dispatches
Race news, entry openings and the odd story from the ice, sent when there's something worth saying.
