Col des deux bassins is a climb of 24.0 kilometers (hors catégorie). Col des deux bassins tops out at 909 m above sea level. It is located in Aït Serghine, Blida, Algérie ⵍⵣⵣⴰⵢⴻⵔ الجزائر. The average gradient is 4.3% with a maximum of 10.8%. The climb has 1043 meters of elevation gain.
Difficulty breakdown: This 24 km climb has an uneven profile that belies its moderate average gradient of 4.3%. The challenge lies in a succession of demanding sections, notably between km 7 and km 14 where the gradient fluctuates between 5% and 6% over nearly 7 km. The flat or downhill stretches (KM 4-6 and KM 17-18) offer brief recovery spots, but not enough for a real rest, so managing your effort is crucial.
Tips for pacing yourself:
1. Managing your pace through the middle section: Look ahead to the tough stretch (KM 7-14) and don't burn matches in the easier opening kilometres. Hold a steady power output as you approach this key section.
2. Using the breaks to recover: Use the short flat or downhill portions (KM 4-6, KM 17-18) to ease off a touch and recover your legs without slowing down too abruptly.
3. Riding a smooth gear: The frequent changes in gradient call for shifting early with your derailleurs to keep a steady cadence and avoid jerky, muscle-straining surges.
24.0 km • 1043 m D+
VAM: average climbing speed, based on elevation gain
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