Dadongshu is a climb of 8.4 kilometers (category 1). Dadongshu tops out at 4,109 m above sea level. It is located in préfecture autonome tibétaine de Haibei, 青海省, 中国. The average gradient is 4.6% with a maximum of 10.8%. The climb has 383 meters of elevation gain.
Difficulty breakdown: The Dadongshu covers 8.4 km for 383 m of elevation gain, with an average gradient of 4.6%, which puts it in Cat 1. The difficulty doesn't come from an extreme ramp but from the alternation of 5% and 6% sections with short breaks at 2%. The final is the hardest part, with KM 6.5-7.0 at 7% then KM 7.5-8.0 at 8%, where the gradient stays steep all the way to the summit.
Tips for managing your effort:
1. Start controlled In KM 0.0-0.5 (3%), find a steady rhythm so you reach KM 0.5-1.0 at 6% without being cooked.
2. Recover on the flat bits Use the 2% sections at KM 3.0-3.5 and KM 4.0-4.5 to get your breathing back and take on fluids.
3. Save something for the end Get your gearing low enough from KM 6.0-6.5 so you can tackle KM 7.5-8.0 at 8% without mashing.
8.4 km • 383 m D+
VAM: average climbing speed, based on elevation gain
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