Col de l’Iseran Alpine Military Road
Europe's highest paved pass through granite peaks
The Col de l’Iseran stands as Europe’s highest paved mountain pass, carved through granite peaks at 2,764 meters above sea level. Originally blasted from solid rock as a WWI military supply route, this engineering marvel connects Val-d’Isère with Bonneval-sur-Arc through 48 kilometers of alpine switchbacks. The route includes the notorious Tunnel de l’Iseran, a 300-meter bore through solid granite that marks the true summit crossing.
This is a moderate technical drive requiring careful throttle control and engine braking on steep descents exceeding 12% grade. Any capable vehicle can make the crossing, but altitude affects performance above 2,000 meters. Open only June through October due to avalanche danger, with sudden weather changes common even in summer. The reward is unfiltered access to glaciated peaks, alpine meadows, and some of the most dramatic mountain scenery in Europe.
Trail Specs
| Difficulty | Moderate |
|---|---|
| Trail Type | Scenic Drive |
| Surface | Mixed |
| Features | High Altitude, Historic, Remote, Scenic |
| Length (miles) | 30 mi / 48.3 km |
| Duration | 1 day |
| Max elevation (ft) | 9068 ft |
| Best season | June-October |
| Minimum vehicle | Any capable vehicle |
| Nearest town | Val-d'Isère, France |
| Land manager | French National Parks |
| Permit required | No |
| Cell service | Spotty |
| Water crossings | No |
| Dispersed camping | No |
| Official sources | vanoise-parcnational.fr |
| 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
Trail Conditions
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Frequently asked questions
Do I need a 4WD or high-clearance vehicle for Col de l'Iseran?
No — it's a paved road throughout, so a standard car can make the drive. That said, the switchbacks are tight and gradients are steep, so a vehicle with decent power and reliable brakes matters more than ground clearance here.
When does the road actually open and close each year?
Typically open June through October, but the exact dates shift depending on snowpack — the pass can stay closed into late June after heavy winters. Check current road status with Bison Futé (bison-fute.gouv.fr) or local Val-d'Isère webcams before you go.
Are there any permits or fees to drive Col de l'Iseran?
No permit or entry fee required — it's a public road. The route passes through Vanoise National Park, so standard park rules apply: no off-road driving, no camping inside park boundaries, and no collecting anything.
What's the hardest section and what should I actually expect?
The push from Val-d'Isère up to the 2,764m summit is the most committing stretch — sustained steep grades, exposed drop-offs, and almost no guardrails on sections. Traffic from cyclists and tourist buses is real in peak summer; patience and tight cornering discipline matter more than technical off-road skill.
Is there anywhere to get gas or water along the 30-mile route?
Fuel up in Val-d'Isère before you leave — there are no gas stations on the pass itself. A small refuge near the summit has basic food and water in season, but treat it as a bonus, not a plan.
Trail track
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