Col du Hantz

Col du Hantz Cycling Climb

The Col du Hantz is a Category 3 climb in France that looks manageable on paper — and largely is — until you hit the sections where the road rears up to its maximum gradient of 11.86%. Understanding the difference between the headline average and what the road actually delivers is the key to riding this one well.

The Numbers

• Length: 7 km
• Average gradient: 3.91%
• Maximum gradient: 11.86%
• Net elevation gain: 275 m
• Total ascent: 338 m
• Start elevation: 367 m
• Summit elevation: 642 m
• Category: 3

The gap between net elevation gain (275 m) and total ascent (338 m) tells you something important: this isn't a clean, unbroken grind from bottom to top. There are undulations — sections where the road dips back down — which means your legs accumulate more work than the net gain alone suggests. Factor that into your effort budget.

How the Gradient Unfolds

With a 3.91% average across 7 km, the Col du Hantz sits in the moderate range — the kind of gradient that rewards steady threshold-adjacent effort rather than explosive attacks. Most of the climb will feel like controlled work on a road that's consistently uphill but never relentlessly steep.

The 11.86% maximum gradient is the wildcard. At nearly three times the average, these harder pitches are concentrated enough to spike your power output sharply. Hit them too hard and you'll pay for it in the kilometres that follow. Identify where the steep sections sit on your GPS before you roll, and plan to arrive at each one with something in reserve.

Pacing Notes

Ride to average power, not average gradient. The 3.91% mean makes it tempting to lock into a comfortable rhythm and hold it for the full 7 km. That works until the road kicks. If you're using a power meter, target a modest reduction below your FTP for the bulk of the climb and absorb the steep pitches at or just above threshold rather than sprinting through them. If you're riding on feel, keep your breathing controlled — conversational effort on the easier sections.

Manage the undulations. The 63 m difference between total ascent and net gain means there are genuine flat or downhill breaks in the climb. Use these to recover actively — spin the legs out, don't freewheel and go cold — then re-engage smoothly as the gradient picks back up.

Gearing

For most trained riders, a standard compact chainset will handle the 3.91% average without issue. The 11.86% maximum, however, warrants a genuine bail gear. If you're on a 34/28 or tighter, check your lowest combination before the ride. Riders who tend to grind a big gear on moderate terrain will find the steep pitches punishing if they haven't already shifted down in anticipation. Cadence discipline — keeping it above 75 rpm even on the harder sections — will protect your legs for whatever comes after the summit. Use the FTP estimator to calibrate target watts if you're planning this as part of a longer route.