Port Vieux de Barroude

Port Vieux de Barroude cycling climb profile

Port Vieux de Barroude is a category 1 climb that asks for patience before it asks for power. On paper, 11.4 km at 7.34% is already a serious aerobic effort. The key detail is the 21.23% maximum gradient, which tells you this is not a smooth metronomic climb where one gear and one effort will carry you cleanly to the top.

The climb starts at 1211 m and tops out at 2049 m, with 838 m of net elevation gain. That relationship between distance and gain is what gives the climb its sustained character. Even without a detailed kilometre-by-kilometre breakdown, the average is high enough that the road cannot afford many genuinely easy sections. If there are moments of relief, they are unlikely to erase the cost of the steeper ramps.

How the gradient shapes the ride

The headline is not just the 7.34% average. It is the spread between that average and the 21.23% maximum. A climb with this profile rewards restraint because the hardest sections are steep enough to force a major cadence drop if you arrive overgeared or already riding above threshold.

The correct approach is to treat the lower part as controlled climbing rather than a place to bank time. Ride just under your sustainable climbing effort, keep torque low where possible, and avoid the temptation to chase speed on any gentler sections. The climb's length means early surges have a long tail. Once fatigue accumulates, the steepest pitches become much more expensive because you lose the ability to smooth them out with cadence.

Pacing and gearing notes

Use a gear range that lets you stay seated on sustained gradients around the average while still having a bailout option for the 21.23% ramp. If your easiest gear only feels comfortable on moderate climbs, it is likely too tall here.

A good pacing structure is simple:

• Start below your target climbing effort for the opening phase
• Settle into a steady tempo around the 7.34% average sections
• Save a clear margin for the maximum-gradient ramps
• Keep cadence protected rather than chasing speed
• If using power, anchor the effort around your climbing threshold and avoid repeated spikes above /glossary/ftp

The summit at 2049 m also matters because the climb finishes high relative to its 1211 m start. The practical takeaway is that Port Vieux de Barroude should be ridden as a sustained endurance test with tactical conservatism. The rider who wins this climb is not the one who feels best at the bottom, but the one who still has a usable gear and stable rhythm when the road reaches its steepest point.