Col des Bagenelles

Overview

The Col des Bagenelles sits in the Vosges mountains of eastern France and carries a Category 3 rating — a classification that can lull riders into complacency. At 11.5 km with an average gradient of 4.09% and 764 m of total ascent, the numbers look manageable on paper. The 17.54% maximum gradient tells a different story.

How the Gradient Unfolds

Starting at 436 m elevation, the road climbs progressively toward a summit at 905 m. The 4.09% average masks significant variance across the 11.5 km. This is not a consistent grind — the climb alternates between gentler passages that invite a higher tempo and sharp ramps that punish anyone who has burned too many matches early.

The 17.54% maximum gradient represents a serious wall somewhere on the upper section. Riders who treat the lower slopes as a warm-up spin and push hard through the mid-climb will arrive at the steep ramps already in oxygen debt. The relatively low average gradient means the punishing pitches are offset by flatter or easier stretches, so the climb rewards patience and attention to what is ahead rather than what the average figure suggests.

Key Gradient Characteristics

• Length: 11.5 km
• Average gradient: 4.09%
• Maximum gradient: 17.54%
• Total ascent: 764 m
• Start elevation: 436 m
• Summit elevation: 905 m
• Category: 3

Pacing Strategy

The wide gap between average (4.09%) and maximum (17.54%) gradients is the central pacing challenge. A power target built around the average will leave you badly over-threshold on the steep ramps. Instead, treat this climb in two modes:

1. Easier sections: Ride at or slightly below your threshold power. Use these stretches to recover, not to bank time.
2. Steep ramps: Shift down early — before the gradient bites — and accept a lower speed. Trying to muscle through a 17% pitch in the wrong gear burns glycogen at a rate the rest of the climb cannot justify.

If you are unsure of your current threshold numbers before attempting the Bagenelles, use the FTP estimator to set realistic power targets.

Gearing Notes

Do not underestimate the 17.54% maximum. On a climb where the average is just over 4%, it is tempting to run a standard compact setup and assume the easy sections will cover the hard ones. They will not. A 34-tooth inner chainring paired with a 32-tooth or larger cassette sprocket is prudent. Riders on gravel bikes or those carrying any additional weight should lean toward the largest available sprocket.

Cadence management matters as much as gear selection. Spinning out the legs on the flat passages and then grinding a big gear on the steep pitches accelerates fatigue. Aim to keep cadence reasonably consistent by shifting proactively rather than reactively.

Ride Character

The Col des Bagenelles is a climb that suits steady, disciplined riders more than pure power climbers. The 11.5 km distance is long enough that an aggressive early effort will cost time before the summit. The relatively modest Category 3 rating and 4.09% average make it accessible to a wide range of fitness levels, but the 17.54% maximum ensures that anyone who ignores pacing discipline will suffer for it. Treat it with the same respect you would give a climb with a higher average gradient — because in its sharpest moments, it earns that respect.