collada de Toses

Collada de Toses cycling climb profile

The collada de Toses cycling climb is defined less by brute average gradient and more by duration. At 31.8 km, this is a long category 1 ascent, rising from 699 m to 1926 m. The headline average of 3.85% can make it look manageable on paper, but that number is spread across a lot of road and a recorded net elevation gain of 1227 m.

That combination matters. A climb this long asks for restraint early because the cost of riding above threshold compounds. The average gradient suggests plenty of sections where the road is not constantly severe, but the maximum gradient of 12.67% is a reminder that the climb is not simply a metronomic false flat to the top. The difficulty comes from having to keep pressure on the pedals for a long time while still holding enough back for the steeper pitches.

How the gradient shapes the ride

With 31.8 km at 3.85%, the natural rhythm is endurance tempo rather than repeated anaerobic surges. The climb rewards riders who can settle into a sustainable output and avoid treating the easier sections as recovery coasts or the steeper sections as attacks.

The key pacing mistake is to anchor your effort to the average gradient. A 3.85% average does not mean the climb always feels gentle. The 12.67% maximum gradient means there are moments where cadence can collapse if the gearing is too ambitious, especially after a long build-up of fatigue. Those ramps are where riders who have spent too much energy early will start paying interest.

Pacing strategy

Ride the first part as if the climb is longer than it looks. The distance is the main stressor, so the right target is controlled and repeatable rather than heroic. If using power, keep the effort below your limit until the final portion of the climb, using /glossary/ftp as the reference point rather than chasing speed.

A good rule here is to keep the shallow sections honest but not aggressive. They are where you preserve momentum and avoid unnecessary spikes. On the steeper sections, let speed fall before power surges too far above target. The climb is long enough that one overgeared ramp can damage the rest of the ascent.

Gearing notes

Bring gearing that respects the 12.67% maximum gradient, not just the 3.85% average. A setup that feels efficient on the lower-grade sections still needs a bailout option for the steepest ramps, particularly late in a 31.8 km effort.

The ideal gear lets you stay seated, keep cadence under control, and avoid grinding when the road pitches up. If you are estimating what you can hold for the full climb, use a realistic threshold input from /tools/ftp-estimator and pace the ascent as a long aerobic effort with selective pressure, not as a short climb with a summit sprint attached.