Jeju 100K

Course

By gradient, 36% of the distance is uphill, 38% downhill and 26% flat. The longest climb runs 9.9 km at an average 14.3% grade (1408 m of vertical). The longest descent runs 9.1 km at 12.7% (1160 m of vertical). The steepest climb averages 31.4% over 0.5 km. The steepest descent drops at 30.6% over 0.9 km. Surface: 53% trail, 28% road, 9% smooth, and 8% technical.

Poles

Poles bring little benefit here — only about 14.0 km of pole-friendly terrain.

Quad damage

Quad damage risk is moderate (index 48 of 100), with 53% of the load in the first half: 2 descents deserve a plan and a couple of downhill sessions before race day.

• Control on the marked descents until km 55, target pace until km 88, free after that. Short descents not listed: target pace.
• #1 · 23.5–32.6 km · 1078 m D−, -11.8% · 70% of the race ahead → control
• #2 · 51.2–62.7 km · 1275 m D−, -11.1% · 43% of the race ahead → target pace
• 83.9–88.6 km · 291 m D−, -6.2% · 19% of the race ahead → even, let go at the end
• 95.1–101.5 km · 454 m D−, -7.1% · 8% of the race ahead → even, first half under control, let go at the end