Nailong Shan Yakou is a climb of 19.9 kilometers (hors catégorie). The climb finishes at 4,541 m above sea level. It is located in préfecture autonome tibétaine de Garzê, 四川省, 中国. The average gradient is 5.4% with a maximum of 13.9%. The climb has 1083 meters of elevation gain.
Difficulty breakdown: With 19.9 km for 1083 m of climbing and an average gradient of 5.4%, the climb to 乃龙山垭口 from Sitongda is HC-rated, mainly because of its sheer length. The gradient stays between 4% and 8% the whole way up, with no real break, so you're working steadily for a long time, and both your legs and your heart get a serious workout. The toughest stretch is between km 6.0 and km 8.0, with 8% followed by 7%. The clearest breather is from km 12.0 to km 14.0, at 4%.
Pacing tips:
1. Hold a steady pace from the bottom On the first few kilometres at 5% (km 0.0 to 2.0), don't be tempted to go out too hard. Save something in the tank for later.
2. Prepare for the steepest section Between km 6.0 and km 8.0, drop into an easy gear as soon as the 8% section starts, and keep a smooth spin rather than mashing the pedals.
3. Use the flatter section to recover Between km 12.0 and km 14.0, at 4%, eat, drink and drop your shoulders so you hit the final kilometres at 5% and 6% (km 14.0 to 16.0) in good shape.
19.9 km • 1083 m D+
VAM: average climbing speed, based on elevation gain
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