Colle della Barma

Colle della Barma cycling climb profile

Colle della Barma is an HC climb in Italy that reads easier on average than it is likely to feel on the road. The headline number is 30.6 km at 5.42%, but that average is doing a lot of smoothing. The climb starts at 242 m and finishes at 1899 m, gaining 1657 m net, while the total ascent is 1742 m. That extra 85 m matters because it tells you this is not a perfectly even ramp from bottom to summit.

The practical takeaway is simple: do not pace this like a steady mid-gradient alpine climb. The average suggests patience, but the maximum gradient of 27.9% says the route contains at least one section severe enough to punish overgearing, poor fueling, and any early ego riding.

How the gradient unfolds

From the available profile data, the main shape is long, irregular, and increasingly costly as fatigue accumulates. Over 30.6 km, a 5.42% average is already enough to require sustained aerobic control, but the gap between net elevation gain and total ascent shows there is some non-linear terrain in the profile. In riding terms, that usually means rhythm is harder to hold than the average gradient implies.

The most important number is the 27.9% maximum gradient. Even if that steepest pitch is short, it changes the whole climb. A rider who treats the first half as a tempo climb can still be forced into torque-heavy efforts later, and those efforts come after a long time spent climbing. That is where the climb becomes HC in feel, not just in classification.

Pacing and gearing notes

The safest pacing strategy is to ride the opening with restraint and assume the climb will ask for repeated adjustments. Use /glossary/ftp as the ceiling reference rather than the target. On a climb this long, the mistake is not going too slowly early. The mistake is drifting above sustainable power because the average gradient feels manageable, then meeting the steepest pitches with no muscular reserve.

Gearing should be chosen for the maximum gradient, not the average. A setup that feels fine at 5.42% can become a liability when the road approaches 27.9%. The goal is not to spin easily everywhere, but to avoid being forced into low-cadence survival riding when the gradient spikes. If your easiest gear only works on steady climbs, it is probably not the right choice for Colle della Barma.

For riders estimating effort, use the climb as a durability test rather than a pure threshold test. The key is keeping enough margin to handle the irregularity and the extra ascent hidden inside the profile. Check your likely sustainable power with /tools/ftp-estimator, then plan the ride around controlled output, frequent fueling, and a final third where the real cost of the climb is likely to show.