Col de Tamié

Col de Tamié Cycling Climb

Col de Tamié sits in the French Alps as a Category 2 climb — long enough to test your aerobic engine, uneven enough to punish anyone who ignores the numbers. The road rises 608 m net over 10.6 km, with total ascent of 700 m once the terrain's undulations are accounted for. That discrepancy between net and total gain is your first warning: this climb has rollers baked in, which means you'll be burning matches on short rises even after you think you've already climbed.

The Numbers at a Glance

• Length: 10.6 km
• Average gradient: 5.71%
• Maximum gradient: 21.83%
• Net elevation gain: 608 m
• Total ascent: 700 m
• Category: 2

How the Gradient Unfolds

An average of 5.71% reads as manageable — roughly the kind of sustained grade where a well-paced rider can settle into a rhythm. But the 21.83% maximum gradient tells a different story. That peak is nearly four times the average, which means a short, savage ramp lurks somewhere on the road. When the gradient spikes that sharply, it's typically over a compressed stretch of 100–300 m, and it has a disproportionate physiological cost: heart rate spikes, legs flood with lactate, and the recovery after is longer than riders expect.

The 92 m difference between net gain (608 m) and total ascent (700 m) confirms the profile isn't clean. Expect at least one meaningful false flat or brief descent mid-climb that will briefly allow recovery but also demand you re-accelerate onto the next pitch.

Pacing Strategy

The central mistake on a climb like this is treating the 5.71% average as the target effort. It isn't. Because of the gradient variance — particularly that 21.83% spike — a power-based approach is far more reliable than gradient-feel riding.

Recommended approach:

• Set a ceiling, not a floor. Decide on a power output or FTP percentage you'll hold on the moderate sections, and commit to it. Riding 5–8% above threshold on the ramp simply to keep pace with faster riders is a fast route to a blown effort.
• Anticipate the ramp. If you know where the steep section falls, shift down before you need to. Trying to downshift mid-ramp at high torque risks dropped chains and wasted momentum.
• Don't accelerate through the false flats. The temptation after a relief section is to push harder. Resist it — those 700 m of total ascent add up, and you want reserves for the upper slopes.
• Use the descent, if there is one, as active recovery. Keep pedaling lightly, eat or drink if you haven't, and bring heart rate down before the road tips up again.

Gearing Notes

For most riders, a compact chainset (50/34 or 46/30) paired with an 11-32 or 11-34 cassette will cover the full gradient range here. The 21.83% maximum is steep enough that a rider pushing a 39/28 or smaller compact/large-sprocket combination may find themselves grinding to a near-standstill. If you're riding a standard double, pre-select a gear you can actually turn over before the gradient bites.

Use the FTP estimator to calibrate your power targets before heading to the col — riding a Category 2 climb without a reference point for sustainable output is how long days become very long days.

Final Assessment

Col de Tamié is not a climb that punishes the unprepared through relentless steepness alone — it does it through inconsistency. The average gradient flatters the difficulty. Respect the maximum, account for the undulating profile, and save something for whatever lies above the midpoint.