Col de Tenneverge

Col de Tenneverge cycling climb profile

Col de Tenneverge is an HC climb in CH built around one simple demand: sustained climbing for a long time. At 17.8 km with an average gradient of 7.84%, it is not a climb where the headline number is softened by long flat stretches. The route gains 1,398 m from a start elevation of 642 m to a summit elevation of 2,040 m, while total ascent is 1,417 m. That small difference between net gain and total ascent suggests the effort is mostly one-directional: up.

That matters tactically. On a climb like this, the danger is not only the maximum gradient of 17.1%. It is the way steep ramps land after a lot of accumulated vertical gain. A short wall early in a ride is a gearing problem. A 17.1% pitch inside an HC climb averaging nearly 8% is a metabolic problem if pacing has already drifted above control.

How the gradient rides

Without detailed split data, the safest read is to treat Col de Tenneverge as a sustained endurance climb rather than a variable climb with obvious recovery sections. The average gradient is high enough that momentum will rarely carry you through mistakes, and the total ascent figure indicates very little wasted elevation.

The opening should be ridden with restraint. Starting at 642 m, the climb still has the full 1,398 m of net elevation gain ahead, so early power that feels manageable can become expensive quickly. The middle portion is where the average gradient does its real damage. At 7.84% over 17.8 km, the climb asks for steady torque and disciplined breathing for long enough that small pacing errors compound.

The summit comes at 2,040 m, so the final phase should be protected from the start. Even if the road eases in places, the profile does not support the assumption of meaningful recovery. Ride the climb as if every softer section is a chance to stabilize, not a place to chase speed.

Pacing and gearing

The correct pacing strategy is conservative early, controlled through the middle, and only aggressive once the summit is realistically within reach. If riding by power, anchor the effort around sustainable climbing intensity rather than responding to every change in pitch. For most riders, this means keeping the steepest ramps under control instead of trying to hold the same speed across them. See /glossary/ftp if you use threshold power to set climbing targets.

Gearing should be chosen for the 17.1% maximum gradient, not the 7.84% average. The average tells you the climb is hard. The maximum tells you whether you can stay seated, keep cadence from collapsing, and avoid burning matches when the road bites. A compact or sub-compact setup with a generous climbing cassette is the practical choice for most riders.

The key mistake is treating Col de Tenneverge like a rhythm climb where one strong tempo settles everything. The data points to something more punishing: a long HC ascent with little implied relief and enough steepness to punish overconfidence. The fastest ride here is likely the one that feels slightly too controlled in the first half.