Col Bayard

What to Expect on Col Bayard

Col Bayard is a Category 2 climb in the French Alps, covering 8.7 km from base to summit. Starting at 735 m elevation, it rises 597 m of total ascent to top out at 1,268 m. At an average gradient of 6.13%, it sits in the range where the road demands sustained effort without ever feeling flat — but the 13.09% maximum gradient signals that there are sections sharp enough to break rhythm and blow up a poorly managed effort.

This is not a climb that forgives early aggression.

How the Gradient Unfolds

With 8.7 km to cover and a 597 m elevation gain averaging 6.13%, Col Bayard is consistent enough to tempt riders into settling at a single pace from the bottom. Resist that. The gap between the average (6.13%) and the maximum (13.09%) is over 7 percentage points, which tells you the climb has at least one — likely more — genuinely steep ramp embedded in an otherwise moderate gradient profile.

Key gradient characteristics:

• Average gradient: 6.13% — manageable at threshold pace for trained riders, but across 8.7 km it accumulates
• Maximum gradient: 13.09% — steep enough to require either a gear change or a short out-of-the-saddle effort to maintain power
• Total ascent: 597 m — meaningful volume; this isn't a short punch

Expect the overall feel to be a rolling moderate climb with at least one section that bites hard. If you don't know exactly where the steep ramps fall on your GPS, treat any section that starts steepening quickly as a potential 13% wall and back off 20–30 seconds before it arrives.

Pacing Strategy

For an 8.7 km effort, most riders will be looking at somewhere between 25 and 45 minutes of climbing depending on fitness. That duration puts this squarely in threshold to sub-threshold territory — you should be working, but not going into the red in the first third.

Recommended approach:

1. First 2–3 km: Settle below threshold. The average gradient will feel manageable; use that to your advantage by banking energy rather than time.
2. Middle section: Maintain steady power. Watch for gradient spikes. When the road kicks toward the maximum, shift before you need to — waiting until you're already grinding costs more than the gear change saves.
3. Final 2 km: If you've paced correctly, this is where you can lift effort. A 6.13% average finish is rideable at or slightly above threshold without catastrophic fade.

Gearing Notes

A 13.09% maximum gradient at altitude means you want low-end gearing available. For most road setups:

• Compact chainset (50/34) with an 11-32 cassette gives comfortable headroom through the steepest sections
• Standard chainset (53/39) riders should have at least a 28-tooth cassette; a 25 will put you in trouble on the steepest ramp if your legs are already loaded
• If you're estimating your appropriate climbing pace, the FTP estimator can help you set a realistic watts-per-kilogram target before the ride

Don't arrive at the steep section already in your smallest gear. Spin a slightly higher cadence on the moderate sections so you have somewhere to go when the gradient spikes.

Summary

Col Bayard rewards patience. Eight-point-seven kilometres at 6.13% average is a climb you can ride well or ride badly depending almost entirely on how early you commit. The 13.09% maximum keeps you honest. Treat it as a sustained threshold effort with a hard section to manage, not a race from the bottom.