Col du Fanget

What to Expect on the Col du Fanget

The Col du Fanget sits in the Category 3 bracket, but that classification can lull you into complacency. Over 9.1 km the road climbs 501 m of total ascent from a start elevation of 1,065 m to the summit. The average gradient of 4.45% sounds manageable — and for long stretches it is — but a maximum gradient of 19.65% signals that at least one section of this road gets brutally steep.

That gap between average and maximum tells you everything about the climb's character. Sustained moderate ramps are punctuated by at least one short, sharp ramp pushing close to 20%. If you come in hot from the easier pitches without managing your effort, that wall will crack you.

Gradient Breakdown

The overall numbers paint a picture of an uneven climb:

• Length: 9.1 km
• Total ascent: 501 m
• Average gradient: 4.45%
• Maximum gradient: 19.65%
• Category: 3

The spread between average and maximum — nearly 15 percentage points — suggests the climb is not a constant grind. Expect flatter recovery sections that drag the average down, and one or more steep ramps that spike well above it. Ride the moderate sections conservatively; they are recovery, not an invitation to accelerate.

Pacing Strategy

Because the average gradient is relatively modest, the temptation is to push above threshold early. Resist it. The 19.65% maximum ramp will demand a short, concentrated effort that is extremely difficult to manage if your legs are already loaded with lactate.

A sensible approach:

1. Open at or below threshold — use the first few kilometres to settle into a rhythm around 90–95% of your FTP.
2. Identify the steep ramp before you hit it — if you have a course preview loaded on your head unit, note the exact kilometre where gradient spikes. Arrive at that point with something in reserve.
3. Attack the ramp in a low gear, seated — at close to 20%, traction and core stability become factors. Standing and mashing risks rear-wheel spin on loose or wet road surfaces.
4. Recover on the flatter sections — don't treat flat segments as bonus speed; treat them as micro-recoveries before the next pitch.

Not sure where your FTP sits? Use the FTP Estimator before planning your power targets.

Gearing Notes

For the 19.65% maximum pitch, an ultra-compact chainset or a wide-range cassette is strongly advisable. On a standard compact (50/34), a 32-tooth sprocket is a minimum recommendation; a 34-tooth gives you meaningful headroom.

If you are on a 1x drivetrain, confirm your low gear ratio handles gradients above 18% at a cadence you can sustain for 30–60 seconds — that is roughly the duration a ramp at this pitch is likely to last given the overall climb length.

Riders comparing gearing requirements across similar climbs may find the Col du Fanget sits in a middle ground: not demanding enough to require a dedicated climbing build, but spiky enough to punish under-geared setups.

Bottom Line

The Col du Fanget is an approachable Category 3 climb that hides a sting in its steepest ramp. Nine kilometres of mostly moderate gradients make it accessible for a wide range of fitness levels, but the near-20% maximum pitch demands respect, appropriate gearing, and disciplined pacing from the bottom. Treat the easy sections as work, not rest, and you will be poorly positioned when the road kicks up.