I kept seeing wildly different numbers when I looked up Seoraksan autumn foliage timing for this year, so I went back to the actual park announcement instead of trusting the aggregator sites. Here's what's confirmed, and what's still just a forecast.
What's confirmed: first color already spotted
On August 31, 2026, the Seoraksan National Park Office (part of the Korea National Park Service) announced that the first autumn color of the year had already been observed near Daecheongbong, the park's highest peak at 1,708 meters. That's the official marker used every year — first foliage is declared once about 20% of a mountain's summit area has turned.
From there, color spreads downhill gradually. The park office noted that from mid-September, the colored area at the summit was expected to expand past the 20% mark and keep working its way down toward the lower trails.
Seoraksan autumn foliage 2026: the forecasted peak window
Separately, seasonal foliage forecasts (based on historical patterns and this year's temperature trends) put the Seoraksan foliage peak — roughly 80% of the mountain colored — somewhere between October 16 and October 25. These forecasts also note that because September and October temperatures are running warmer than average this year, peak color is expected to arrive later than a typical year, by roughly a week or more.
Treat the October date as a moving target, not a booking deadline. Forecasts published in September get revised as the season goes; check an updated forecast closer to your travel date rather than locking in a date months out.
So, how do you plan a trip around Seoraksan autumn foliage?
1. Aim for the week of October 20-27 first, then adjust based on updated forecasts closer to your trip — this window straddles the forecasted range while giving you flexibility if peak color shifts a few days either way.
2. Book your cable car or shuttle in advance if you're going during peak weekends. Seoraksan gets extremely crowded during peak color, especially at the Sokcho-side entrance near the cable car station — see our separate guide on the Seoraksan cable car for booking details.
3. Pick a weekday if your schedule allows it. The difference between a Saturday and a Tuesday at Seoraksan during peak week is not small — trailheads and parking fill up by mid-morning on weekends.
My own rule of thumb after checking flight and bus schedules for this trip: book anything refundable if you're targeting peak color, because a forecast made in September can still shift by several days once October's actual weather plays out.
Getting to Seoraksan from Seoul
The park has multiple entrances, but most first-time visitors head for the Sokcho side (설악동, near the Seoraksan Tourist Complex), where the cable car and the main Sinheungsa Temple trail are located.
- Intercity bus: Direct buses run from Seoul's Dong Seoul or Express Bus Terminal to Sokcho, roughly 2-2.5 hours depending on traffic. From Sokcho Intercity Bus Terminal, local buses or a taxi (about 15-20 minutes) get you to the park entrance.
- Car: Around 2.5-3 hours from Seoul via the Seoul-Yangyang Expressway, longer during weekend peak-season traffic.
- There's no direct train to Sokcho as of 2026, so bus is the more common option for travelers without a car.
Why the two entrances matter for foliage viewing
Seoraksan isn't one easy loop — the terrain varies a lot by elevation and by which side of the park you enter from. The Sokcho-side (Outer Seorak) entrance near the cable car is the most accessible and where most of the foliage photos you've seen online were taken. The Osaek and Baekdamsa areas on the western/southern side see the same seasonal color but with fewer crowds and longer approach hikes.
If you only have one day, Outer Seorak (cable car side) is the practical choice for catching autumn foliage without a long hike in. If you're staying overnight nearby and want a quieter experience, the Osaek entrance is worth the extra travel time.
Bottom line
Seoraksan's first foliage of 2026 was already confirmed at the end of August near Daecheongbong, and forecasts point to a peak sometime between October 16 and 25 — likely later than usual given this year's warmer temperatures. If Seoraksan autumn foliage is the main reason for your trip, I'd book flexible travel dates if you can, and check an updated forecast in early October before locking anything in. That single habit — waiting on the closer forecast rather than a September estimate — is the difference between catching the color and missing it by a few days.
Primary sources: Seoraksan National Park Office announcement, reported by Kyunghyang Shinmun, August 31, 2026, and the Korea National Park Service reservation system for cable car and trail information.
Photo credit Seoraksan National Park (Namseorak) — Korea Tourism Organization, KOGL Type 1
Frequently Asked Questions
Do I need a reservation to enter Seoraksan National Park?
General park entry doesn't require a reservation, but the cable car does get booked out on peak-color weekends — check availability a few days ahead through the official cable car operator, Korea National Park Service reservation system.
Is Seoraksan foliage better than other mountains like Naejangsan?
They peak at different times and offer different scenery — Seoraksan is known for dramatic rock peaks alongside the color, while Naejangsan (further south) typically peaks later, in November, and is known for maple-lined valley trails. If your dates don't line up with the Seoraksan autumn foliage window, Naejangsan's later peak can be a useful backup.
What if I can only go in early October?
Early October will likely catch color at higher elevations near Daecheongbong but not yet at the lower trails and park entrance — expect a partial, higher-altitude show rather than the full valley-to-summit display.