Fuorcla da Flix cycling climb profile
Fuorcla da Flix is a long category 1 climb in CH, and the headline numbers tell you the important thing straight away: this is not a short power climb. At 19.7 km, rising from 1173 m to 2329 m, it asks for sustained aerobic control before it asks for aggression.
The average gradient is 5.87%, which can look manageable on paper. The trap is that an average over nearly 20 km smooths out the real cost of the climb. A maximum gradient of 19.82% means there is at least one section steep enough to punish poor gearing, poor pacing, or both. The profile data does not specify where that steepest ramp arrives, so the safest tactical assumption is that you cannot spend the lower slopes riding as if the climb will stay at its average.
How the gradient unfolds
From bottom to summit, Fuorcla da Flix gains 1156 m of elevation. That amount of vertical gain over 19.7 km creates a climb that is primarily defined by duration. Even if much of the road feels moderate, the total workload keeps accumulating. This is the kind of ascent where small over-threshold efforts early can become expensive later, especially if the steepest pitches arrive after fatigue has already built.
The 5.87% average suggests there should be enough rideable gradient to settle into rhythm, but the 19.82% maximum changes the pacing equation. You should expect a climb that can shift from tempo riding into low-cadence torque demands. The key is not to chase speed on every easier section, but to keep enough margin that the steep ramps do not force repeated surges above sustainable power.
Pacing strategy
Treat Fuorcla da Flix as an endurance climb with intermittent stress, not as a steady threshold test. If riding by power, the opening target should sit below your true climbing limit, especially if your /glossary/ftp estimate is based on shorter efforts. A 19.7 km climb gives plenty of time for early optimism to turn into late damage.
A practical approach:
- Start controlled and let the climb come to you.
- Keep cadence smooth on the average-gradient sections rather than forcing a big gear.
- Save your highest efforts for the steepest ramps, where the road may demand them.
- Avoid repeated accelerations unless you are intentionally riding the climb as a hard interval.
If you do not know your current sustainable power, use a recent benchmark or estimate before building a pacing plan with /tools/ftp-estimator.
Gearing notes
The maximum gradient of 19.82% is the decisive gearing clue. Even though the average is under 6%, you need a low enough gear to stay seated and controlled when the road steepens sharply. Overgearing this climb is risky because the steep sections are layered onto a long total duration, not isolated in a short effort.
For most riders, the right setup is one that keeps cadence usable on near-20% pitches without turning the rest of the climb into excessive spinning. The goal is not to gear for the average. It is to gear for the hardest part while pacing for the full 19.7 km.