Why Odaesan — a mountain where autumn colour flows downhill
Most autumn foliage spots peak at a single moment. Odaesan is different. Colour begins at the summit of Birobong (1,563 m), works its way through the Sangwonsa area and the middle section of Seonjae-gil, and finally reaches Woljeongsa and the lower Odaecheon valley. Visit in early October for the first flush of red at high elevation, mid-October for the peak along Seonjae-gil, and late October for the lingering late-autumn colour around Woljeongsa's fir forest and the valley floor. Match your visit to the elevation, and a single trip can take in all of Odaesan's autumn in sequence.
Route 1 — Birobong & Sangwonsa: early to mid-October, the first colour on the mountain
The earliest autumn colour on Odaesan appears around Sangwonsa and the Birobong summit ridge, both well above 1,000 m. The cooler temperatures here bring colour earlier than anywhere else on the mountain, and the higher you climb the deeper the hues. Colour typically begins in early October and approaches its peak by mid-month. Looking down from the Birobong trail across the ridgeline foliage gives a strong sense of the mountain's scale. This section demands a reasonable level of fitness; an early-morning start is advisable.
Route 2 — Seonjae-gil: mid to late October, the centrepiece of the autumn season
Seonjae-gil — the valley trail connecting Sangwonsa to Woljeongsa — is considered the defining image of autumn on Odaesan. The path is mostly flat, making it accessible for walkers of all ages, and red and yellow foliage lines both sides of the Odaecheon stream throughout. The trail peaks around mid-October and becomes the highlight of any autumn visit to the mountain. The standard direction is to start at Sangwonsa and walk down toward Woljeongsa. If a full traverse feels too long, walking only the middle section and turning back is a practical alternative. There is no entrance fee.
Route 3 — Woljeongsa & Odaecheon valley: through late October, a relaxed finish to the day
The fir-tree avenue at Woljeongsa creates an unusual atmosphere as autumn colour filters in among hundreds of old firs lining both sides of the path. Even after the higher elevations have faded, this area retains colour into late October, so a later visit is unlikely to disappoint. A slow walk along the Odaecheon valley makes a natural conclusion to the day.
Getting there & practical information
**Public transport:** Take KTX to Jinbu (Odaesan) Station, transfer to Jinbu Intercity Bus Terminal, then board a bus toward Woljeongsa and Sangwonsa. Bus frequency can be limited, so check the timetable with Odaesan National Park office (033-332-6417) before you go.
**By car:** Use Jinbu IC on the Yeongdong Expressway. Parking fills quickly on peak-foliage weekends; a weekday visit in the early morning is recommended.
**Scenic drive:** The section of Local Road 446 toward Hongcheon Naemyeon is open only through late October. Access conditions can vary, so confirm before you travel.
**Food:** A handful of restaurants operate near Woljeongsa and Sangwonsa, but waiting times can be long during peak season. Packing snacks or a lunch box in advance will keep your itinerary running smoothly. Confirm individual restaurant hours before your visit.
October on Odaesan passes quickly. Which week you choose determines the colours you meet.
