KTL Information
Korea Forest Service Predicts 2026 Fall Foliage Peak — Seoraksan Oct 20, Naejangsan Nov 4
On September 22 the Korea Forest Service released a forecast map showing nationwide peak autumn colors in late October 2026. Seoraksan is expected to peak on Oct 20 and Naejangsan on Nov 4, about 0.8 days later than the long‑term average.
KTL Editorial · September 28, 2026
The Korea Forest Service's forecast map indicates that peak fall foliage across the country is likely to occur in late October 2026. The map presents both a national trend and region-by-region expected peak dates, showing that even within the same season different mountains can reach peak color at different times.
In the Service's specific projections, Seoraksan is expected to reach its peak on October 20, while Naejangsan is projected to peak on November 4. These region-specific dates are highlighted as key examples on the forecast map.
The Korea Forest Service notes that this season's peak timing is about 0.8 days later than the long-term average. The forecast's main point is that most peak dates cluster in late October nationwide, though individual areas may hit their maximum colors at different moments.