Yumyungsan
📍 Gyeonggi-do · Nearest city: Yangp'yong (9 km)
30 XC score / 100 · takeoff at 804 m · 📍 View on map
Coordinates and external links
37.57370, 127.48500Forecast next days
Updated: 2026-04-21 02:09 UTC · Source: Open-Meteo · Thermal window 10:00–18:00 local time
Marginal conditions, cloud base ~908 m, wind 16 km/h.
base ~908m · wind 16 km/hMarginal conditions, cloud base ~1193 m, wind 14 km/h.
base ~1193m · wind 14 km/hMarginal conditions, cloud base ~1322 m, wind 12 km/h.
base ~1322m · wind 12 km/hComposite flyability score (CAPE + LI + wind + precip + low clouds). Cross-check with local pilots before flying.
🌬 Daily wind (next days)
Daily summary (10m wind). Full hour × altitude chart is being added progressively.
Takeoff orientations
Green = good orientation · Yellow = possible · Gray = not suitable
Why this site has thermal potential
| Factor | Value | Interpretation |
|---|---|---|
| Hotspot density (5 km) | 0 | Low |
| Avg thermal probability | 0.00 | Based on thousands of aggregated IGC flights |
| Solar orientation | 0.97 | Slope faces south in northern hemisphere |
| Own flight history | 0.00 | Thermals detected in platform IGC tracks |
Takeoff description
The site features three launch areas that cater for slightly different wind directions. All launch sites are netted over so snagging is rare. The two most popular launch sites are free from obstructions and have gentle grassy slopes. The third is steeper and has trees either side as you take off.
Rules and notes
It's mainly a site for tandem pilots. First priority to tandems
Pilot comments
A regular thermal flows up the south face of the peak to the West of the launch.
Nearby sites
Yebongsan (8) · Choburi (8) · Mt. Jungkwang (7) · Munsubong (8) · ChunCheon (19) · Anseong (8)