Kluane Slims River Flats Road — Haines Junction to Kluane Lake via the Donjek Route Approach
Glacier-carved outwash, grizzlies, and zero pavement.
The old Slims River no longer reaches Kluane Lake — the Kaskawulsh Glacier retreated far enough in 2016 to reroute the entire river, an event scientists called one of the first documented cases of river piracy in modern times. The 4WD track across the former delta and up into the Donjek River approach corridor follows routes used by Indigenous Champagne and Aishihik peoples for thousands of years and by Yukon Gold Rush prospectors who nearly killed themselves on these braided outwash channels. Today the flats are a bone-dry glacial dust bowl in summer wind and a silty maze in breakup season, demanding navigation skills and patience. Kluane Lake itself is a turquoise shock when you crest the last gravel bench above the tree line.
Moderate difficulty on a dry summer day — the track is wide, the surface is firm gravel and compact glacial till — but that changes violently after rain when the outwash clay turns slick and the braided crossings run fast and silty. High-clearance AWD or light 4WD is the minimum; a full-size overlander with good tires and a shovel is smarter. Kluane National Park boundary requires registration and there is a park entry fee. Best season is late June through mid-September. Fuel up in Haines Junction — the next reliable fuel is a long way in any direction. Cell service ends the moment you leave the Alaska Highway corridor. Grizzly activity is high; bear canisters and awareness are mandatory, not optional.
Trail Specs
| Difficulty | Moderate |
|---|---|
| Trail Type | Backcountry, High Clearance, Overland Route |
| Surface | Gravel, Mixed, Sand |
| Features | Camping, Historic, Remote, Scenic, Water Crossings |
| Length (miles) | 47 mi / 75.6 km |
| Duration | 1-2 days |
| Max elevation (ft) | 3200 ft |
| Best season | June-September |
| Minimum vehicle | High-clearance AWD or 4WD |
| Nearest town | Haines Junction, Yukon, Canada |
| Land manager | Parks Canada — Kluane National Park and Reserve |
| Permit required | Yes |
| Cell service | None |
| Water crossings | Yes |
| Dispersed camping | Yes |
| Official sources | Parks Canada Kluane National Park |
| Start coordinates | |
| End coordinates | |
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Location
Trail Conditions
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Frequently asked questions
Can a stock lifted AWD crossover handle this route, or do I actually need a 4WD truck?
A high-clearance AWD with solid underbody protection can manage it in dry conditions, but a proper 4WD with low range is strongly preferred — the braided outwash channels and sandy flats can swallow a lightly-built rig fast. Skid plates are not optional here. A stock crossover should stay home.
When does this route typically open and close each year?
June through September is the reliable window. Spring melt keeps the Slims River flats flooded and unstable into late May most years, and early snowfall can shut things down by October. Check with Parks Canada in Haines Junction before you go — conditions shift fast in the Kluane backcountry.
Do I need a permit to drive this route through Kluane National Park and Reserve?
Yes. Kluane National Park and Reserve requires a park entry permit, and if you're camping overnight in the backcountry you need a backcountry camping permit as well. Get both from the Parks Canada visitor centre in Haines Junction before you leave pavement — there's no one to sort it out for you once you're in.
What's the hardest section of this route and what actually makes it dangerous?
The glacier-fed outwash braids near the Slims River flats are the crux — multiple shallow but fast-moving channels cross the route with no defined ford, and the sandy bottom shifts constantly between trips. High-water days after glacial melt can make sections impassable mid-afternoon even when they were fine in the morning. Scout on foot before you commit to any crossing.
Is there any fuel or resupply between Haines Junction and the end of this route?
No. There is nothing between Haines Junction and the far end of this route — no fuel, no services, no cell service whatsoever. Top off your tank and carry extra fuel before you leave Haines Junction, and plan your range conservatively given the soft sand sections that eat fuel faster than tarmac.
Trail track
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