Col du Mollard

Col du Mollard cycling climb profile

The Col du Mollard is an HC climb in France that gives very little away on paper. At 10.8 km with an average gradient of 9.22%, it is not a climb where the headline length tells the full story. The difficulty comes from the density of the climbing: the road rises from 333 m to 1333 m, and the context lists a net elevation gain of 1000 m, so the work rate has to be high almost from the start.

That average also matters because it sits close enough to double digits that there is limited margin for over-pacing. A climb averaging 9.22% for this duration is not simply a long threshold effort. It becomes a muscular climbing effort, where cadence, torque, and heat management can decide whether the final section is controlled or defensive.

How the gradient unfolds

The available profile data does not break the climb into named ramps or intermediate sectors, so the honest read is to treat the Col du Mollard as consistently steep rather than as a climb with obvious recovery shelves. The maximum gradient is 13.36%, which means the road does pitch well above the average, but the average itself is already severe enough that the harder sections are likely to feel like accelerations on top of an already demanding baseline.

That is the key tactical point. On a climb like this, the danger is not one isolated steep ramp. It is the accumulation of repeated high-torque efforts when the baseline gradient is already costly. If you ride the opening kilometres at the effort you would use for a shorter climb, the upper half will expose it.

Pacing strategy

Start below the effort you think you can hold. The first priority is to avoid turning the lower slopes into a series of small anaerobic debts. Even if the legs feel good, the gradient profile argues for restraint because there is a full 10.8 km of climbing to manage and almost a thousand metres of vertical work to absorb.

A sensible pacing model is:

• Settle early into a sustainable rhythm rather than chasing speed.
• Keep pressure on the pedals steady through the steepest pitches instead of surging.
• Use the 13.36% maximum gradient as a warning to leave room for torque spikes.
• If riding by power, anchor the effort around a climb-specific sustainable output rather than short-climb aggression. See /glossary/ftp for how this relates to threshold pacing.

Gearing notes

Bring a genuinely low climbing gear. The combination of 9.22% average gradient and 13.36% maximum gradient means this is not a climb to muscle through on ambition alone. The right gear is the one that lets you keep cadence from collapsing when the road kicks above the average.

For most riders, that means prioritising range over pride. If your easiest gear only feels comfortable on moderate gradients, it will likely become too big here. The best setup is one that lets you stay seated for long periods, manage traction and posture, and avoid repeated out-of-saddle surges simply to keep the bike moving.

Bottom line

The Col du Mollard cycling climb is a steep, sustained HC ascent where pacing discipline matters more than early speed. The numbers point to a climb that punishes optimism: 10.8 km at 9.22%, with pitches up to 13.36%, is enough to turn small pacing errors into large losses near the summit. Ride it like a long threshold-plus-strength effort, gear it conservatively, and save your hardest riding for when the summit is genuinely close.