About Chongli 100
Chongli 100 is the 104km ultra trail at Nike ACG 2025 Ultra-Trail Chongli 2025 (Chongli, China). The race starts on July 11, 2025.
Race strategy
Hold a steady pace and save energy for every section.
- Steep 29% wall. Control your pace and stay focused.
- 894m descent. Go easy, save your quads.
- The finish is runnable. Save your legs to run it all the way.
- 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 53.0km, then run your race pace.
- Start · 0.0km–1.3km · Race-day nerves push your heart rate up: don't follow the crowd, find your own rhythm.
- Settle in · 1.3km–9.9km · Descent of 330m averaging 10%. Plus 1 more climb. Ease in: hold back more than feels necessary. The race is still ahead. 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.
- Work · 9.9km–53.0km · Descent of 517m averaging 9%, descent of 626m averaging 9%, high point 2117m, descent of 894m averaging 6%. 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 · 53.0km–95.9km · Plus 3 more climbs and 3 descents. Your energy fades, and that's normal: hold a steady effort and stop counting the miles. Climb by heart rate or breathing, not pace. Running pays off here: run wherever you can. Your heart rate drifts down on its own: don't chase your early-race numbers, go by feel.
- Home · 95.9km–103km · 6.7km of runnable trail. No heroics: settle back into your own effort and hold it to the line. Running pays off here: run wherever you can.
Course
The course climbs 5116m+. With 49m/km of climbing, this is a true mountain course with sustained climbs and descents. By gradient, 39% of the distance is uphill, 45% downhill and 16% flat. The longest climb runs 6.8km at an average 9.6% grade (653m of vertical). The longest descent runs 19.8km at an average 6.4% grade (1265m of vertical). The steepest climb averages 40.6% over 0.2km. The steepest descent drops at 28.8% over 0.5km. Surface: 29% trail, 27% road, and 19% smooth. Flat-equivalent effort: 146.5 FlatKM.
Poles
Poles bring little benefit here: only about 21.2km of pole-friendly terrain.
Quad damage
Quad damage risk is high (index 56 of 100), with 46% of the load in the first half: 4 critical descents, the last of them run on already damaged legs. Downhill-specific preparation and a controlled early pace pay off here.
- Control your HR on the first mountain, save your quads on the descents until 53.0km, then run your race pace.
- #4 · 6.6–9.9 km · 330 m D−, -10.1% · 92.7 km ahead → control
- #3 · 16.2–22.0 km · 517 m D−, -9.0% · 80.6 km ahead → control
- #2 · 28.8–35.7 km · 626 m D−, -9.1% · 66.9 km ahead → control
- #1 · 39.1–53.1 km · 894 m D−, -6.4% · 49.5 km ahead → control
- 76.1–95.9 km · 1265 m D−, -6.4% · 6.7 km ahead → your pace
- Plus 2 more notable descents not listed: your pace.
Weather
On race day, start temperatures have historically ranged from 20°C to 27°C, with around 22°C at the highest point; the chance of precipitation is about 47%.
Results
914 finishers completed the 2025 edition. Men's winner: Bate Mengkai (China) in 10:30:55. Women's winner: Veronika Leng (Slovakia) in 12:19:47.
This page has the full results and splits, a pacing and nutrition planner, a gradient matrix, an interactive elevation profile and historical weather for Chongli 100.
