Heishanmen Yakou is a climb of 6.5 kilometers (category 1). The climb finishes at 1,129 m above sea level. It is located in préfecture autonome dai et jingpo de Dehong, 云南省, 中国. The average gradient is 4.8% with a maximum of 11.5%. The climb has 314 meters of elevation gain.
Difficulty analysis: At 6.5 km long, with an average gradient of 4.8% and 314 m of elevation gain, the 黑山门丫口 is rated Category 1 and demands a sustained effort. The real challenge is the alternation of rhythms: several sections at 7% (km 2.0-3.0, km 4.0-4.5 and km 5.5-6.5) are broken up by easier stretches at 2% (km 1.0-2.0, km 3.0-3.5 and km 5.0-5.5). These changes make it hard to settle into a steady rhythm and keep loading the same muscles over and over.
Tips for pacing:
1. Don't go out too hard. The first 500 m at 6% (km 0.0-0.5) tempt you to attack, so keep a steady cadence right from the bottom of the climb.
2. Recover on the flat-ish sections. Use the 2% stretches (km 1.0-2.0 and km 3.0-3.5) to eat, drink and get your legs turning over again without burning through your reserves.
3. Save something for the finish. The last 1.5 km at 7% (km 5.5-6.5) is where the race is decided, so keep some gas in the tank and dole out your effort all the way to the summit.
6.5 km • 314 m D+
VAM: average climbing speed, based on elevation gain
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