Contwoyto Winter Road — Yellowknife to Ekati Diamond Mine via the Arctic Barren Lands Ice Road
Eight weeks. Frozen lakes. No road otherwise.
The Tibbitt to Contwoyto Winter Road is the world’s longest heavy-haul ice road — roughly 600 kilometers of frozen lakes and short portages connecting Yellowknife to the diamond mines of the Northwest Territories and Nunavut. The road only exists for about eight weeks in February and March when lake ice reaches the mandatory 107-centimeter load-bearing threshold for the 40-tonne trucks that convoy fuel and supplies north. For the window when it’s open to permitted vehicles, you drive across open tundra lakes so large the far shore disappears — nothing but wind-scoured whiteness and the tire tracks of semis ahead of you. Dettah, Tibbitt Lake, Jolly Lake, and eventually the Contwoyto Lake region mark the waypoints; there is nothing else.
This is not a recreational trail in the casual sense. Access for non-commercial vehicles requires coordination with the Tibbitt to Contwoyto Development Corporation (TCDC), which manages the road for the mine operators. Speed limits on the ice are strict — typically 25 km/h over water crossings to prevent dangerous wave action under the ice. You need a minimum of a reliable 4WD truck with survival gear for minus-40°C temperatures, satellite communication, extra fuel, and the genuine ability to self-rescue. Cell service is nonexistent. The road closes hard the moment spring thaw threatens. What you earn is the most genuinely remote and cold drive on the continent — a road that exists only because winter makes it possible.
Trail Specs
| Difficulty | Expert |
|---|---|
| Trail Type | Backcountry, Overland Route |
| Surface | Mixed |
| Features | Historic, Remote, Scenic |
| Length (miles) | 373 mi / 600 km |
| Duration | 2-4 days |
| Max elevation (ft) | 1540 ft |
| Best season | February-March |
| Minimum vehicle | Reliable 4WD truck with cold-weather survival package |
| Nearest town | Yellowknife, Northwest Territories |
| Land manager | Tibbitt to Contwoyto Development Corporation (TCDC) |
| Permit required | Yes |
| Cell service | None |
| Water crossings | No |
| Dispersed camping | No |
| Official sources | TCDC Winter Road operator site |
| Start coordinates | |
| End coordinates | |
| Copy both for Google Maps directionsClick to copy the directions URL · or open it directly in a new tab | |
| Find on Google | Search on Google → |
Location
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Frequently asked questions
Can a stock pickup truck run the Contwoyto Winter Road, or do I need a purpose-built rig?
A reliable 4WD truck with a cold-weather package is the bare minimum — think engine block heater, arctic-rated fluids, and a battery that won't die at -40°C. Stock suspension is fine since the road is graded, but you need redundant survival gear, a satellite communicator, and the mechanical competence to self-rescue 300+ miles from nowhere. This is not a trail for vehicles with deferred maintenance.
When exactly does the Contwoyto Winter Road open and close each year?
The road typically opens in early February and closes by late March or early April — roughly an 8-week window determined by ice thickness, not a calendar date. Opening and closing are decided by TCDC based on real-time ice monitoring, so the schedule shifts year to year. Climate warming has been shortening the season; confirm with TCDC before you plan anything.
Do private vehicles need a permit to drive the Contwoyto Winter Road?
Yes. The road is a private industrial haul route operated by TCDC for mining supply convoys, and access by non-commercial vehicles requires explicit permission from TCDC — it is not a public road. Contact JWO Road Services (jworoadservices.com) well in advance; they control access and can deny entry. Showing up unannounced will get you turned around at the gate.
What's the most dangerous section and what actually makes it hard?
The lake crossings are the crux — not because they're technically difficult to drive, but because a mechanical breakdown or a wrong line on thin ice can be fatal with zero rescue infrastructure nearby. The road is graded and flat, but whiteout conditions can eliminate visibility entirely, and blowing snow can erase the road markers. The danger is environmental and logistical, not technical driving skill.
Is there any fuel or resupply available between Yellowknife and Ekati, and how much range do I need?
There is no public fuel available on the route — 373 miles of Arctic tundra with zero services. You need to carry all fuel for the entire distance plus a substantial reserve for idling (you will idle overnight to keep the engine warm). Calculate your consumption at cold-temperature efficiency rates, which can drop 20–30% below normal, and carry more than you think you need.
Trail track
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