DMY 100K

Race strategy

Hold a steady pace and save energy for every section.

• Big early climb with 1.2km gain. Hold your pace, save your legs for later.
• 579m descent. Go easy, save your quads.
• Final 784m descent. Save your legs to go all out on it.
• Long race. Control your HR and effort. Early mistakes cost the most.
• Control your HR on the first mountain, save your quads on the descents until 58.0km, then run your race pace, and start the final descent from 86.2km under control, then go all out near the bottom.
• Start · 0.0km–1.2km · Race-day nerves push your heart rate up: don't follow the crowd, find your own rhythm.
• Settle in · 1.2km–14.5km · Climb of 1158m, high point 1652m. Ease in: hold back more than feels necessary. The race is still ahead. Climb by heart rate or breathing, not pace. Hike the steepest pitches.
• Work · 14.5km–47.6km · Descent of 579m averaging 7%, descent of 397m averaging 9%, descent of 444m averaging 8%. Plus 3 more climbs. This is where the race is built: steady, solid effort. Climb by heart rate or breathing, not pace. This descent is hard on the legs: short steps, stay in control, poles if you have them. Hike the steepest pitches.
• Fade · 47.6km–86.2km · Descent of 333m averaging 22%, descent of 411m averaging 11%, climb of 519m. Plus 2 more climbs and 1 descent. Your energy fades, and that's normal: hold a steady effort and stop counting the miles. Climb by heart rate or breathing, not pace. This descent is hard on the legs: short steps, stay in control, poles if you have them. Running pays off here: run wherever you can. Hike the steepest pitches. Your heart rate drifts down on its own: don't chase your early-race numbers, go by feel.
• Home · 86.2km–95.5km · Descent of 784m averaging 8%. No heroics: settle back into your own effort and hold it to the line. Very long descent: first half under control, then even, let go only near the end. Hike the steepest pitches.

Course

By gradient, 42% of the distance is uphill, 32% downhill and 26% flat. The longest climb runs 14.5km at an average 8.0% grade (1158m of vertical). The longest descent runs 9.4km at an average 8.4% grade (784m of vertical). The steepest climb averages 36.7% over 0.5km. The steepest descent drops at 43.0% over 0.4km. Surface: 69% trail. Flat-equivalent effort: 133.1 FlatKM.

Poles

Trekking poles are strongly recommended: about 7.4km of the course is steep enough for them to pay off.

Quad damage

Quad damage risk is moderate (index 47 of 100), with 44% of the load in the first half: 5 descents deserve a plan and a couple of downhill sessions before race day.

• Control your HR on the first mountain, save your quads on the descents until 58.0km, then run your race pace, and start the final descent from 86.2km under control, then go all out near the bottom.
• #1 · 14.5–22.2 km · 579 m D−, -7.4% · 73.3 km ahead → control
• #2 · 25.3–29.5 km · 397 m D−, -9.4% · 66.0 km ahead → control
• #3 · 34.5–40.1 km · 444 m D−, -8.0% · 55.5 km ahead → control
• #5 · 47.6–49.1 km · 333 m D−, -21.7% · 46.4 km ahead → control
• #4 · 54.2–58.0 km · 411 m D−, -10.7% · 37.5 km ahead → control
• 86.2–95.5 km · 784 m D−, -8.4% · 0.0 km ahead → even, first half under control, let go at the end
• Plus 1 more notable descent not listed: your pace.

Weather

On race day, start temperatures have historically ranged from 10°C to 18°C, with around 12°C at the highest point; the chance of precipitation is about 25%.

Results

419 finishers completed the 2025 edition. Men's winner: Zhengqiang Xiong (China) in 10:15:08. Women's winner: Fuzhao Xiang (China) in 11:00:49.