Jangsu Mountain is a climb of 9.0 kilometers (hors catégorie). The climb finishes at 697 m above sea level. It is located in Chaeryong, 황해남도, 조선민주주의인민공화국. The average gradient is 7.7% with a maximum of 16.9%. The climb has 698 meters of elevation gain.
Difficulty breakdown: This 9 km climb with 698 m of elevation gain averages 7.7%, which puts it well above your typical classic col. The first 1.5 km, at 3-4%, give you a chance to warm up, but from km 1.5 the road kicks up and stays steep, with gradients often between 9 and 15% from km 2.0 to km 5.5. The hardest section is between km 5.5 and km 6.0 at 16%, right after the 14% ramp from km 5.0 to 5.5. The HC rating comes from the combination of length and a string of brutal ramps.
Tips for pacing the climb:
1. Save your legs from the bottom. On the first 1.5 km at 3-4%, keep a steady, easy tempo so you have something left for the long steep sections.
2. Manage your gears on the ramps. On the km 4.0-4.5 section at 15% and the km 5.5-6.0 section at 16%, keep a smooth cadence and a easy gear rather than mashing the pedals.
3. Recover on the descent. Use the km 6.5-7.5 descent (-11% then -9%) to spin your legs and catch your breath, but keep it controlled, before the climb back up at 10% from km 7.5 to 8.0.
9.0 km • 698 m D+
VAM: average climbing speed, based on elevation gain
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