Col du Ballon d'Alsace

Col du Ballon d'Alsace Cycling Climb

The Col du Ballon d'Alsace sits in the Vosges mountains of northeastern France and carries Category 1 status for good reason. At 7.7 km with an average gradient of 8.08% and 762 metres of total ascent, it demands sustained power output from bottom to summit. The road lifts from 549 m at the base to 1,169 m at the top — a climb that will expose any weakness in your pacing strategy or gearing setup.

How the Gradient Unfolds

The average of 8.08% is not gentle, but it is the maximum gradient of 16.76% that defines the character of this climb. That kind of ramp means sections of the road are significantly steeper than the average implies — expect the gradient to fluctuate, with easier stretches used up quickly when a sharp ramp hits.

As a general pattern on climbs of this profile:

• Lower slopes tend to lure riders into pushing harder than is sustainable. The road feels manageable early and the temptation to bank time is real.
• Mid-section is where accumulated fatigue from the steeper pitches begins to compound. Heart rate climbs faster than speed justifies.
• Upper slopes into the summit at 1,169 m are where the 16.76% maximum is most likely to appear. At this point glycogen stores are depleted and any gradient spike is severely punishing.

Pacing Notes

With 7.7 km and an 8% average, this is not a climb you can sprint and recover on. Treat it as a sustained threshold effort. If you are riding to power, target a pace you can hold for the full duration rather than attacking early ramps aggressively.

A useful reference: riders with a solid grasp of their functional threshold power should be targeting somewhere in the 85–95% FTP range for a climb of this length and category. If you have not recently tested your FTP, the FTP estimator tool gives a working number before you commit to a number on the road.

Key pacing principles for Ballon d'Alsace:

• Start conservatively. The 16.76% maximum gradient is a wall — arrive at it with reserves.
• Keep cadence smooth through gradient changes. Surging out of steep sections wastes energy.
• Use the shallower sections to recover slightly, not to accelerate.

Gearing

With a maximum gradient pushing nearly 17%, compact gearing is strongly advisable. A 34-tooth inner chainring paired with a 32- or 34-tooth cassette sprocket gives you the mechanical advantage to maintain a viable cadence when the road tilts hardest. Riders on a standard double who have not climbed sustained Category 1 gradients before should reconsider their setup before attempting this.

The 762 m of total ascent over 7.7 km leaves no room for poor gear selection mid-climb. Running out of gears at the steepest pitch — with the summit still ahead — is a common and avoidable mistake.

Bottom Line

The Col du Ballon d'Alsace is a serious Category 1 climb. Its 8.08% average understates the difficulty when the road spikes toward 16.76%. Ride within yourself for the first half, protect your cadence through the steep sections, and arrive at the upper slopes with enough left to see it through. For comparison with other major European climbs, see the Alpe d'Huez profile.